1. Oxygen\'s atomic number is 8. This means that an oxygen atom has (a) Eight ne

Question

1. Oxygen's atomic number is 8. This means that an oxygen atom has (a) Eight neutrons in its nucleus (b) A total of eight protons and neutrons (c) Eight protons in its nucleus (d) A total of eight neutrons and clectrons 2. A Ca ion differs from a Ca" atom in that the Ca ion has (a) more electrons (b) more protons (c) fewer protons (d) fewer electrons 4. What do elements sulfur (S), nitrogen (N). phosphorus (P), and bromine (Br) have in common? (a) They are noble (inert) gases (b) They are nonmetals (c) They have the same thermal conductivity (d) They have the same number of protons 5. (a) Determine what element is denoted by the following electronic configuration 1s22s 2p 3s 3p (b) Draw the Bohr model of the potassum (K) atom Page 1

Explanation / Answer

1)

Atomic number is same as number of protons

So, there are 8 protons in nucleus

Answer: c

2)

Ca2+ is formed when Ca0 loses 2 electrons

So, it will have more protons than ca0

Answer: b

4)

They are all non metals

Answer: b

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