How many valence electrons does an atom of an element with an atomic number of twelve have?

1 Answer

Answer :

ANSWER: TWO

Related questions

Description : An atom of an element with mass number 23 and atomic number 11 will have- (1) 11 neutrons, 12 protons and 11 electrons (2) 11 protons, 12 neutrons and 11 electrons (3) 11 protons, 12 electrons and 11 neutrons (4) 23 protons and 11 electrons

Last Answer : (2) 11 protons, 12 neutrons and 11 electrons

Description : Atoms of different elements have - (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configuration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons

Last Answer : (3) different atomic number and different number of valence electrons Explanation: Each element's atoms have a different number of protons, neutrons, and electrons, which is why they have different ... Their reactivity also varies because of the number and activeness of the electrons in the atom.

Description : Atoms of different elements have (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configu-ration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons

Last Answer : different atomic number and different number of valence electrons

Description : Electrons in the highest energy level of an atom are called _______. (1) valence protons (2) orbital protons (3) valence electrons (4) orbital electrons

Last Answer : (3) valence electrons Explanation: The outermost orbital shell of an atom is called its valence shell, and the electrons in the valence shell are valence electrons.

Description : How many electrons are there in the valence shell of a calcium atom?

Last Answer : ANSWER: 2

Description : From the elements: Cl, Br, F, O, Al, C, Li, Cs and Xe; choose the following: (a) The element with highest negative electron gain enthalpy. (b) The element with lowest ionization enthalpy. ( ... . (f)The element which belongs to zero group. (g) The elements which forms largest number of compounds.

Last Answer : Ans. (a). The element chlorine (Cl) has the highest negative electron gain enthalpy. (b). The element cesium (Cs) has lowest ionization enthalpy. (c). The element fluorine F has lowest atomic radius. (d ... zero group (or group 18). (g). The element carbon (C) forms the largest number of compounds.

Description : The atomic number of an element is equal to the number of __________ present in its atom. (A) Neutrons (B) Electrons (C) Protons (D) Either (B) or (C)

Last Answer : (D) Either (B) or (C)

Description : How do you figure out how many valence electrons an atom has based on its location on the periodic table?

Last Answer : For groups 1-2 the number of valence electrons is equal to the number of the group.For groups 13-18 the number of valence electrons is equal to the number of the group, but with numbering starting up from 3 (13), 4 (14) , etc. (transition metals excluded).

Description : Where can you find the valence electrons in an atom?

Last Answer : Valence electrons are placed in the outermost shell of electrons.

Description : In molecule of calcium sulfide calcium has two valence electron bonds and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium?

Last Answer : What is the answer ?

Description : Valence electrons are the electrons found on the last shell of an atom true or fase?

Last Answer : TRUE

Description : What element has an atomic number lower than that of aluminum and one less valence electron than group 16 elements?

Last Answer : Nitrogen

Description : The rays are given off by a radioactive element from A)Nucleus B)Valence electrons C)All the orbits D)Outer orbit

Last Answer : The rays are given off by a radioactive element from A)Nucleus B)Valence electrons C)All the orbits ... electrons C. all the orbits D. outer orbit

Description : How many valence electrons are in the element fluorine and do the same for chlorine and bromine?

Last Answer : The number of valence electrons is seven.

Description : What element has the same valence electrons as indium?

Last Answer : No other element in its ground state has the same valence electron configuration as indium.Other elements in group 13 have similar ns2np1 outer shell configurations:-Boron B, [He] 2s2 2p1Aluminium, Al, [Ne] 3s2 ... [Ar] 3d10, 4s2 4p1Indium In [Kr] 4d10 5s2 5p1Thallium Tl [Xe] 4f14, 5d10, 6s2 6p1

Description : What element has the same valence electrons as indium?

Last Answer : No other element in its ground state has the same valence electron configuration as indium.Other elements in group 13 have similar ns2np1 outer shell configurations:-Boron B, [He] 2s2 2p1Aluminium, Al, [Ne] 3s2 ... [Ar] 3d10, 4s2 4p1Indium In [Kr] 4d10 5s2 5p1Thallium Tl [Xe] 4f14, 5d10, 6s2 6p1

Last Answer : An element used in semiconductors whose atoms have three valence electrons is An acceptor.

Last Answer : An acceptor is an element used in semiconductors whose atoms have three valence electrons.

Description : Atomic number of an atom gives the number of which of the following? (1) electrons (2) protons (3) neutrons (4) neutrons and protons

Last Answer : (2) protons Explanation: Atomic number of a chemical element is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. ... periodic table. In an uncharged atom, the atomic number is also equal to the number of electrons.

Description : Atomic number of an atom gives the number of which of the following? (1) electrons (2) protons (3) neutrons (4) neutrons and protons

Last Answer : (2) protons Explanation: The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom.

Description : Atomic number of an atom gives the number of which of the following ? (1) electrons (2) protons (3) neutrons (4) neutrons and protons

Last Answer : protons

Description : An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is– (1) 17 (2) 19 (3) 36 (4) 53

Last Answer : (2) 19 Explanation: Mass Number = number of protons (atomic number) + nu.sriber of neutrons. So as per the question, 36= number of neutrons + 17. Number of neutrons= 36 -17= 19

Description : An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is (1) 17 (2) 19 (3) 36 (4) 53

Last Answer : 19

Description : Draw the atomic structure of (i) an atom with same number of sub-atomic particles, (ii) an atom with same number of electrons in L and M shell. -Chemistry 9th

Last Answer : (i) Oxygen Number of electrons = 8 Number of protons= 8 Number of neutron= 8 (ii) Argon Atomic number =18=2,8,8 No of electrons in L shell = 8 No of electrons in M shell = 8

Description : What is the number of electrons in an atom of atomic number Z and mass number A? -Do You Know?

Last Answer : answer:

Description : What is the atomic number of an atom with mass number 9 and 5 electrons?

Last Answer : The atomic number is the number of ProtonsThe mass number is the number of Protons and NeutronsThe number of Electrons always equals the number of ProtonsTherefore according to the above information the atomic ... an Atomic number of4Boron has an Atomic mass of 10.811 and an Atomic number of 5

Description : How many electrons are present in an atom of mercury who is atomic number is 80 and whose mass number is 201?

Last Answer : 121 neutrons.

Description : What is the number of electrons in an atom of atomic number Z and mass number A?

Last Answer : Z

Description : The number of electrons of a neutral atom is automatically known if one knows the? A. Atomic number (Answer) B. Atomic weight C. Number of orbitals D. none

Last Answer : A. Atomic number (Answer)

Description : Atomic weight of an atom is (A) sum of the number of protons and neutrons. (B) sum of the number of protons and electrons. (C) sum of the number of electrons and neutrons. (D) sum of the number of electrons, protons and neutrons.

Last Answer : (A) sum of the number of protons and neutrons.

Description : 1. What is the number of electrons in an atom of atomic number Z and mass number A? 2. With which of the following fields is M. F. Hussain associated? 3. Which is the Slack Season' in ... 19. What are Shield volcanoes? 20. Mughal dynasty was to Bahadur Shah Zafar-as what was Lodi dynasty to?

Last Answer : Answer : 1. Z 2. Painting 3. Jan.-June 4. Australia 5. Valanadu 6. Stomata 7. 9th December, 1946 8. Measuring flask 9. China 10. Rajaraja Chola I 11. Vocal music 12. Abidjan 13. ... N. Rao 17. By radiation only 18. Useful but need strict regulation 19. Repeated lava flows 20. Ibrahim Lodi

Description : A neutral atom with an atomic number of five has electrons equal to: A. 1 B. 5 C. none D. depends on the type of atom

Last Answer : A neutral atom with an atomic number of five has electrons equal to: 5

Description : Difference between Valency and Valence electrons ? -Chemistry

Last Answer : 1 ) Valency : The ability to gain, loose and sharing of electrons is valency / combinig capacity atoms of other elements is valency. 2 ) Valence elctrons : Electrons present in the outermost shell of the atom is valence electrons.

Description : (2) experience collision less frequently Explanation: When an electric field is applied, both the valence electrons and the free electrons move in the same direction. The hole direction is opposite to that ... to free electrons. This means mobility is also less for a hole compared to free electron.

Last Answer : Carbon dioxide is called a greenhouse gas because - (1) its concentration remains always higher than other gases (2) it is used in photosynthesis (3) it absorbs infrared radiation (4) it emits visible radiation

Description : Which one of the following elements has valence electrons in the n = 3 shell? A beryllium B oxygen C silicon D neon E hydrogen

Last Answer : C silicon

Description : How many electrons are there in the valence shell of the O2– ion? A 2 B 8 C 10 D 16 E 18

Last Answer : B 8 

Description : Why don't we include the mass of an atom and electrons in the atomic mass?

Last Answer : Feel Free to Answer

Description : If an atom has 11 protons 12 neutrons and 11 electrons what is the identify of the element and it's mass number?

Last Answer : The mass number is 23; the element is sodium (Na-23).

Description : The number of electrons, present in the valence shell of carbon of carbanion bearing `-ve` charge, is:

Last Answer : The number of electrons, present in the valence shell of carbon of carbanion bearing `-ve` charge, is: A. 8 B. 7 C. 6 D. 4

Description : The number of electrons present in the valence shell of carbon of `CH_(3)overset(+)(C)H_(2)` ion bearing `+ve` charge:

Last Answer : The number of electrons present in the valence shell of carbon of `CH_(3)overset(+)(C)H_(2)` ion bearing `+ve` charge: A. 8 B. 7 C. 6 D. 4

Description : What are the valence electrons? For s-block and p-block elements show that number of valence electrons is equal to its group number.

Last Answer : What are the valence electrons? For s-block and p-block elements show that number of valence electrons is equal to its group number.

Description : What is the number of valence of electrons of strontium?

Last Answer : 2

Description : How many number of valence electrons are there in a sulphide ion?

Last Answer : The sulfide ion is S^2-, so it has 2 additional valenceelectrons compared to neutral sulfur. Neutral sulfur has 6 valenceelectrons, so sulfide ion would have 8 valence electrons.

Description : What is the number of valence electrons for Sn?

Last Answer : Tin has four valence electrons.

Description : What is the number of valence electrons for Ga?

Last Answer : Gallium has three valence electrons.

Description : Do elements in the same family have the same number of valence electrons?

Last Answer : Yes, this is a general rule.

Description : What are the number of valence electrons of atoms in semiconductor?

Last Answer : There are four valence electrons in the atom of a semiconductor.

Description : An atom has atomic number 12, what is its valency and name the element? -Chemistry 9th

Last Answer : Element with atomic number 12 is Magnesium (Mg). Electronic configuration of magnesium is 1s2 2s2 2p6 3s2. It has 2 e- in its outermost orbit and can donate these to form a stable octet. Hence, its valency is +2.

Description : Why is the atomic mass of an element is usually not given as a whole number even though each individual atom of the element has a whole number of protons and neutrons.?

Last Answer : It's the electrons that throw it off.

Description : Atomic number of an element gives (a) The number of protons in its atom (b) The number of nucleons in its atom (c) The weight of the atom of the element (d) The total number of elementary particles in its atom

Last Answer : Ans:(a)