Which of the following is an ionic compound? a) SO_2 b) CIO_2 c) H_2 O d) CaO e)

Question

Which of the following is an ionic compound? a) SO_2 b) CIO_2 c) H_2 O d) CaO e) CO_2 Calculate the number of hydrogen atoms in 0.25 moles of strychnine, C_21 H_22 N_2 O_2. a) 5.5 times 10^24 atoms b) 3.3 times 10^24 atoms c) 2.5 times 10^24 atoms d) 1.5 times 10^24 atoms e) 5.0 times 10^24 atoms Rutherford's gold foil experiment contributed to the discovery that: a) atoms contain electrons b) atoms contain a nucleus c) atoms are mostly empty space d) both "b" and "c" e) none of the above What is the ground state electron configuration of a CI^- ion? a) 1s^2 2s^2 2p^6 3s^2 3p^4 b) 1s^2 2s^2 2p^6 3p^5 c) 1s^2 2s^2 2p^6 3s^1 3p^6 d) 1s^2 2s^2 2p^6 3s^2 3p^2 e) 1s^2 2s^2 2p^6 3s^2 3p^8 The neutral atoms of all of the Isotopes of the same element have: a) different numbers of protons. b) equal numbers of neutrons. c) the same number of electrons. d) the same mass numbers. e) the same masses. The density of ethylene glycol is 1.11 g/ml. The density of mercury is 13.5 g/mL. What volume of mercury has the same mass as 125 mL ethylene glycol? a) 10.3 mL b) 8.34 mL c) 0.120 mL d) 0.971 mL e) 1870 mL Which is true about elemental potassium? a) It is a nonmetal. b) It is a Group II element. c) It is a liquid at room temperature. d) It is very unreactive. e) It is soft ductile and malleable.

Explanation / Answer

Question No: 31

The compounds which are having ionic bonds are ionic compounds. The ionic bond is a chemical bond between metal and non metal, and its kind of electrostatic attraction between oppsite charges which are anion and cation. Here metals are cations and non metals are anions.

The other one is covalent bond, it is also a chemical bond but between two non metals by sharing of electron pairs.

The answer is CaO, here the bond formed between calicum metal (Ca+2) cation and non metal oxygen(O-2) anion.

The rest SO2 , ClO2, H2O and CO2 are non ionic compounds. These components having covalent bonds since these are non metal atoms.

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