42 Atoms of the nonmetallic elements generally form ions by a) gaining electrons

Question

42 Atoms of the nonmetallic elements generally form ions by a) gaining electrons, forming positive ions. b) gaining electrons, forming negative ions. c) losing electrons, forming positive ions. d) losing electrons, forming negative ions. .43 How many valence electrons are present in an atom of silicon in the ground state? a) 1 b) 2 c) 4 d) 8 44 when potassium fluoride forms from a potassium atom and a fluorine atom a) a proton is transferred from the potassium atom to the fluorine atom. b) a proton is transferred from the fluorine atom to the potassium atom. c) an electron is transferred from the potassium atom to the fluorine atom. d) an electron is transferred from the fluorine atom to the potassium atom. 45 Elements of Group 6A generally form ions with a charge of a) +1. b) +2. .46 Given the formula Na3P, what is the formula for lithium and nitrogen? c) LiNa b) Li3N d) LisP a) LiN 47 Which type of chemical bond involves the equal sharing of electrons? a) onic b) polar covalent c) nonpolar covalent .48 As one progresses left to right across a period on the periodic table, electronegativity generally a) increases. b) decreases. c) remains the same. .49 Which of the following bonds is most polar? c00-1 b) N-F a) o-F d) C-N

Explanation / Answer

Q42

nonmetallic elements will most likely GAIN electrons, such as Chlorine, Oxygen, Sulfur, etc...

Therefore, they will form NEGATIVE ions

choose B

Q43

silicon - has 4 electrons in it svalence shell, therefore choo C

Q44

potassium fluoride = KF

electons from K are donated to F, so Kcharges positively and F negatively

choose C

Q45

6A --> those ahve 6 electnos in its valence shell, so will charge with 2 electrons in order to full the octet

then, 2 electrons = -2

choose D

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