Unit 2 Review #2 Question Preview (ID: 33696)


This Is The Second Set Of Questions. TEACHERS: click here for quick copy question ID numbers.

Which best represents how electrons are arranged in the energy levels of an oxygen atom?
a) first energy level = 2 electron and second energy level = 6 electrons
b) first energy level = 3 electron and second energy level = 5 electrons
c) first energy level = 1 electron and second energy level = 7 electrons
d) first energy level = 2 electron and second energy level = 2 electrons

The atomic number of sulfur is 16, what would the number of electrons be in a neutral atom of S?
a) 16
b) 15
c) 32
d) 6

How many protons and neutrons are there in an atom of chlorine-37?
a) 17 p and 20 n
b) 20 p and 17 n
c) 37 p and 37 n
d) 17 p and 37 n

How do isotopes differ?
a) The total number of neutrons
b) The total charge carried by the nucleus
c) The total charge outside the nucleus
d) The total number of protons and electrons

The atomic number of carbon is 6. Consider an isotope of carbon whose mass number is 14.The total charge carried by the nucleus of a neutral atom of this isotope is:
a) 6+
b) 14+
c) 6-
d) 0

One _______ and ______ are added to each element as you move across the periodic table.
a) proton and electron
b) electron and neutron
c) proton and neutron
d) proton and quark

How many valence electrons does bromine have?
a) 7
b) 6
c) 5
d) 1

Atoms of the same element with different numbers of neutrons are
a) isotopes
b) allotropes
c) metalloids
d) radioactive elements

4. The number of protons in a neutral atom is equal to the number of
a) electrons
b) neutrons
c) ions
d) isotopes

The number of protons and electrons in a neutral atom is also equal to the ___
a) atomic number
b) isotope number
c) average atomic mass
d) allotrope number

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