Description : What is a substance formed by an electrostatic attraction between atoms or groups of atoms of opposite charge?
Last Answer : This is an ionic bond.
Description : What is the name of the process where two or more atoms combine to form a new substance?
Last Answer : A: Chemical bonding.
Description : The energy associated with the random motion of molecules or atoms within a substance is?
Last Answer : Thermal energy
Description : If the amount of radioactive substance is increased three times, the number of atoms disintegrated per ubit time would :
Last Answer : If the amount of radioactive substance is increased three times, the number of atoms disintegrated per ubit ... 3)` rd of the original number of atoms
Description : What is a pure substance made of 2 or more types of atoms?
Last Answer : This is a chemical compound.
Description : What is a pure substance whose smallest unit is made of atoms of more than one element?
Last Answer : Compound
Description : What is a force that holds together atoms in a substance?
Last Answer : Metal atoms are held together by strong Electrostatic forcesthat make metals typically strong and solid. Non metals are heldtogether by ether Covalent bonds between two non metals, Ionicbonds between a metal and a non metal.
Description : True or false .During a chemical change atoms are lost or gained to the new substance?
Last Answer : FALSE
Description : The half - life of a radioactive substance depends upon (a) Its temperature (b) The external pressure (c) The mass of the substance (d) The strength of the nuclear force between the nucleons its atoms
Last Answer : Ans:(d)
Description : A homogeneous reactor is the one, in which the (A) Fissile atoms are evenly distributed throughout the mass of nuclear reactor (B) Same substance (e.g. heavy water) is used as moderator & coolant (C) The fuel and the moderator is mixed to form a homogeneous material (D) All (A), (B) and (C)
Last Answer : (C) The fuel and the moderator is mixed to form a homogeneous material
Description : Substance which is composed of similar I' kind of atoms is called?
Last Answer : Elements
Description : Is the amount of a substance that contains Avogadro’s number of atoms/molecules. a. mass b. matter c. gram-mole d. volume
Last Answer : gram-mole
Description : Which one of the following best defines the word allotropes ? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between ... a specific number of neutrons E The different phases (solid, liquid or gas) of a substance
Last Answer : A Different structural forms of an element
Description : The removal of two hydrogen atoms from an alcohol yie what type of chemical substance?
Last Answer : ANSWER: ALDEHYDE
Description : A substance whose molecules consist of dissimilar atoms is called?
Last Answer : A substance whose molecules consist of dissimilar atoms is called compound.
Description : Is A nonpolar bond is formed when two atoms share electrons unequally?
Last Answer : No. A polar bond is formed when electrons are sharedunevenly.A nonpolar bond indicates even sharing of electrons.
Last Answer : Two or more atoms combine to form a molecule.
Description : The pair in which phosphours atoms have a formed oxidation state of `+3` is
Last Answer : The pair in which phosphours atoms have a formed oxidation state of `+3` is ... pyrophosphoric acids D. Orthophosphorous and pyrophosphorous acids
Description : What is a chemical bond formed between shared atoms?
Last Answer : Need answer
Description : How is a covalent bond is formed between atoms?
Last Answer : the atoms share electrons
Description : What chemical compound is formed when sodium atoms combine with hydroxide groups?
Last Answer : A group hydroxide doesn't exist.
Description : Carbon dioxide is formed when to oxygen atoms chemically combined with a carbon atom which term best describes carbon dioxide?
Last Answer : Ggg
Description : The maximum possible chain length of fatty acids formed in the pathway of de novo synthesis is (A) 16 Carbon atoms (B) 18 Carbon atoms (C) 20 Carbon atoms (D) 24 Carbon atoms
Last Answer : Answer : A
Description : Propionyl CoA formed oxidation of fatty acids having an odd number of carbon atoms is converted into (A) Acetyl CoA (B) Acetoacetyl CoA (C) D-Methylmalonyl CoA (D) Butyryl CoA
Last Answer : Answer : C
Description : Propionyl CoA is formed on oxidation of (A) Monounsaturated fatty acids (B) Polyunsaturated fatty acids (C) Fatty acids with odd number of carbon atoms (D) None of these FATS AND FATTY ACID METABOLISM 83
Description : When a bond is formed between two atoms, the energy of the sys-tem will – (1) increase (2) decrease (3) remain the same (4) may increase or decrease
Last Answer : (3) remain the same Explanation: The fundamental reason for the bonding of atoms is that they lose their stored potential energy by forming bonds. This is the only reason for chemical combination. ... a bond is formed between two atoms, stored potential enemy is always released to the surroundings.
Description : Bonds formed by the sharing of an electron pair between two atoms are known as - (1) Covalent bonds (2) Ionic bonds (3) Weak bonds (4) None of the above
Last Answer : (1) Covalent bonds Explanation: Bonds which are formed by the sharing of an electron pair between two atoms are known as covalent bonds.
Description : When a bond is formed between two atoms, the energy so system will be–
Last Answer : Decrease
Description : Pick out the wrong statement. (A) Atoms with same number of nucleons but different number of protons are called isobars (B) Atoms with same number of protons but different number of nucleons are ... product formed by emission of α-particle has mass number less by 4 units than the parent nuclide
Last Answer : (B) Atoms with same number of protons but different number of nucleons are called isoters
Description : The bonds formed by sharing of electrons between the atoms is called?
Last Answer : Covalent bond
Description : Hydrogen bonds are formed when a hydrogen atom is shared between two ____. a. molecules c. elements b. atoms d. neutrons
Last Answer : a. molecules
Description : Covalent bonds are formed by the sharing of a pair of ____. a. atoms c. electrons b. neurons d. protons
Last Answer : c. electrons
Description : Most of the new atoms formed when atoms in a nuclear reactor capture neutrons without fissioning are: w) fission products x) activation products y) actinides z) lead isotopes
Last Answer : ANSWER: Y -- ACTINIDES
Description : In a breeder reactor, new fuel is formed as non-fuel uranium-238 absorbs a neutron and ultimately becomes which of the following fissionable atoms: w) uranium-235 x) plutonium-239 y) uranium-239 z) neptunium-239
Last Answer : ANSWER: X -- PLUTONIUM-239
Description : The bond most likely to be formed when two atoms differ SOMEWHAT in their tendency to attract electrons is: w) nonpolar ionic x) polar ionic y) polar covalent z) nonpolar covalent
Last Answer : ANSWER: Y -- POLAR COVALENT
Description : When a bond is formed between two atoms, the energy of the system will (1) increase (2) decrease (3) remain the same (4) may increase or decrease
Last Answer : remain the same
Description : The tiny block formed by the arrangement of a small group of atoms is called the
Last Answer : The tiny block formed by the arrangement of a small group of atoms is called the unit cell.
Description : What is a new substance that is formed and caused by a reaction?
Description : What Is the soupy substance formed in the stomach (food plus stomach juicesacids)?
Last Answer : Feel Free to Answer
Description : The key substance in the synthesis of purine, phosphoribosyl pyrophosphate is formed by (A) α-D-ribose 5-phosphate (B) 5-phospho β-D-ribosylamine (C) D-ribose (D) Deoxyribose
Description : A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is (a) Grey, Ba2SO4 (b) Yellow, Ba(SO4)2, (c) White, BaSO4 (d) Pink, BaSO4,
Last Answer : Answer: (c) White, BaSO4
Description : The sticky substance formed when sugar is heated to about 473K is called
Last Answer : caramel.
Description : When you do strenuous exercise, oxygen is used up rapidly. What substance is formed. a) pyruvic acid(pron: pie-ROO-vik) b) lactic acid c) glucose d) alcohol
Last Answer : ANSWER: B -- LACTIC ACID