Description : Give reason: a) Metals are electropositive. b) Non-metals are electronegative. c) Even though hydrogen is a non-metal, it is electropositive. d) Sodium is electropositive.
Last Answer : a) Metals are electropositive. Electropositive element has the tendency to lose electrons and form cation.Metals are electron donors. Hence they are electropositive. b) Non-metals are ... is electropositive because donates electrons from last orbit to another element and becomes electropositive.
Description : Why chlorine is electronegative? What type of valency it will show with hydrogen.
Last Answer : Chlorine gains one electron from another atom so as to complete its octet therefore chlorine is electronegative. Type of valency with hydrogen : Co-valency.
Description : The most electronegative element among sodium, bromium, fluorine and oxygen is (a) Sodium (b) Bromium (c) Fluorine (d) Oxygen
Last Answer : Ans:(c)
Description : The most electronegative element among the following is - (1) sodium (2) bromine (3) fluorine (4) oxygen
Last Answer : (3) fluorine Explanation: Fluorine is the most electronegative element, while francium is one of the least electronegative.
Description : The most electronegative element among the following is – (1) Fluorine (2) Sodium (3) Chlorine (4) Oxygen
Last Answer : (1) Fluorine Explanation: Electronegativity of the elements using the Pooling Scale is as follows: Fluorine: 3.98, Oxygen: 3.44, Chlorine: 3.16, and Sodium: 0.93. Electronegativity increases down the group and decreases down the period.
Description : Which of the following element is most electronegative?
Last Answer : Fluorine
Description : Metalloid is (A) Highly electronegative in nature (B) An element which exhibits the properties of both metal & non-metal (C) An alloy (D) All (A), (B) and (C)
Last Answer : (B) An element which exhibits the properties of both metal & non-metal
Description : Metalloid is (A) An element, which exhibits the properties of both metal & non metal (B) Highly electronegative in nature (C) An alloy (D) All (A), (B) & (C)
Last Answer : (A) An element, which exhibits the properties of both metal & non metal
Description : The most electronegative element among the following is (1) Fluorine (2) Sodium (3) Chlorine (4) Oxygen
Description : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly electronegative elements like F and
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with ... )d` and linear D. `sp` and linear
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly ... D. `sp^(3)d^(2)` & 2
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly ... A. zero B. 2 C. 6 D. 8
Description : Is nitrogen electronegative?
Last Answer : Nitrogen has a valence of 3 which attracts it to get electronsfrom other molecules..this attraction it has to complete it'soutermost layer is called electronegativity.
Description : Which of the following is not correct concerning substitution and elimination reactions of alkyl halides? (a) The electrophile replaces the leaving group. (b) Compounds containing electron-donating groups bonded to an ... replaced by another atom or group in substitution reactions. (d) (a) and (b)
Last Answer : (a) and (b)
Description : 1H nuclei located near electronegative atoms tend to be ______ relative to 1H nuclei A. Shielded B. Deshielded C. Resonanced D. Split
Last Answer : Deshielded
Description : The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is
Last Answer : The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorus acid is A. zero B. two C. one D. three
Description : In nucleotides, phosphate is attached to sugar by (A) Salt bond (B) Hydrogen bond (C) Ester bond (D) Glycosidic bond
Last Answer : Answer : C
Description : DNA nucleotides are attached by (a) Hydrogen bonds (b) Covalent bonds (c) VANDER Wall's force (d) Electrovalent bonds
Last Answer : Ans:(b)
Description : Were there any activities/games you experienced as a kid that had an element of danger attached?
Last Answer : We used to go to new construction sites and have dirt bomb fights and make forts in the rafters. This was fun and games until we got old enough to really be throwing large clumps. My friend Chris, still to ... at the age of 36 enjoy most of my aches and pains. Ahhh the comings of age. God bless it.
Description : What element do hydrocarbons sometimes contain in stead of hydrogen and carbon?
Last Answer : Need answer
Description : Is hydrogen a rare element in the universe as a whole?
Last Answer : No. Its the most common.
Description : What element is created when hydrogen atoms fuse together in the sun and core?
Last Answer : Helium.
Description : The first element on the periodic table of elements is hydrogen?
Last Answer : is it true or false
Description : The greatest number of compounds are formed by the element (a) hydrogen (b) carbon (c) oxygen (d) nitrogen
Description : The element with highest first ionization energy is - (1) hydrogen (2) helium (3) lithium (4) sodium
Last Answer : (2) helium Explanation: The first ionisation energy is the energy required to remove the most loosely held electron from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of ... ) of Hydrogen: around 1200: Helium: about 2500; Lithium: about 500; and Sodium: about 500.
Description : The element present in the largest amount in rocks and minerals is - (1) carbon (2) silicon (3) hydrogen (4) aluminium
Last Answer : (2) silicon Explanation: Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure free element in nature. It is most widely distributed in dusts, sands, planetoids, and planets as various forms of silicon dioxide (silica) or silicates.
Description : In addition to hydrogen, the other abundant element present on Sun’s surface is - (1) Helium (2) Neon (3) Argon (4) Oxygen
Last Answer : (1) Helium Explanation: The Sun is composed primarily of the chemical elements hydrogen and helium; they account for 74.9% and 23.8% of the mass of the Sun in the photosphere, respectively. All ... out of which it formed: the hydrogen and helium in the Sun were produced by Big Bang nucleosynthesis.
Description : The most abundant element by number in the living system is : (1) Nitrogen (2) Hydrogen (3) Oxygen (4) Carbon
Last Answer : (2) Hydrogen Explanation: In sequential order, Hydrogen. Oxygen, Carbon and Nitrogen are the most abundant elements by number in the living system. Hydrogen constitutes 49.8% of living systems, while Oxygen ... . It is not surprising, therefore, that the living cell is between 60% and 90% water.
Description : Which of the following is the most common element in the Universe? (1) Nitrogen (2) Oxygen (3) Hydrogen (4) Carbon
Last Answer : (3) Hydrogen Explanation: Hydrogen is the most abundant element in the Universe; helium is second.
Last Answer : (3) Hydrogen Explanation: Hydrogen is the most abundant element in the Universe; helium is second. However, after this, the rank of abundance does not continue to correspond to the atomic number; oxygen has abundance rank 3, but atomic number 8. All others are substantially less common.
Description : What is the first element in the periodic table? A. Hydrogen (Answer) B. Helium C. Nitrogen D. Carbon
Last Answer : A. Hydrogen (Answer)
Description : An inert element has electron shells that a. Overlap The Shells Of Other Atoms. b. Are Completely Filled With Electrons. c. Yield Hydrogen Ions. d. Form Covalent Bonds.
Last Answer : b. Are Completely Filled With Electrons.
Description : Plastics are compounds of carbon with element (A) Hydrogen (B) Nitrogen (C) Oxygen (D) All of thes
Last Answer : Answer: Option D
Description : Who named the element hydrogen?
Last Answer : ANSWER: LAVOISIER
Description : What element has a lower boiling point than hydrogen?
Last Answer : ANSWER: HELIUM
Description : The most abundant element in the universe is thoug to be: w) carbon x) oxygen y) hydrogen z) nitrogen
Last Answer : ANSWER: Y -- HYDROGEN
Description : All proteins contain at least 5 specific elements. Four of them are carbon, oxygen, hydrogen, and nitrogen. What is the fifth element?
Last Answer : ANSWER: SULFUR
Description : After carbon, hydrogen, and oxygen, the next most abundant element in proteins is:
Last Answer : ANSWER: NITROGEN
Last Answer : Hydrogen
Description : In addition to hydrogen, the other abundant element present on Sun’s surface is (1) Helium (2) Neon (3) Argon (4) Oxygen
Last Answer : Helium
Description : The element with highest first ionisation energy is (1) hydrogen (2) helium (3) lithium (4) sodium
Last Answer : helium
Description : Which one of the following is a micro-element ? (1) Chlorine (2) Hydrogen (3) Nitrogen (4) Oxygen
Last Answer : Chlorine