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25 questions
As you move from left to right on the periodic table, the number of valence electrons.......
Increases
Decreases
Remains the same
As you move down a group on the periodic table, the number of valence electrons....
Increases
Decreases
Remains the same
Which of the following would be most similar to Phosphorus? (select all that apply)
Nitrogen
Sulfur
Silicon
Germanium
Antimony
The common charge on an atom in group 17 would be....
+1
+7
-7
-1
17
Which of the following is the term for a substance in which all the atoms have the same number of protons
a compound
An element
a molecule
a solid
a gas
Which of the following reasons explains why there is a decimal for most atomic masses?
The mass of one atom can have a fraction.
Since electrons are very small mass they only add a little bit, usually only a decimals worth.
It is the average mass of all the potential isotopes of an atom.
Neutrons have a mass of 1.1 meaning that fractions are common.
Which of the following is true of atomic radius?
The radius is mainly due to how large an atom's nucleus is.
The radius is mainly due to the size of the electron cloud.
The atomic radius is a way we measure the mass of an atom.
Neutrons account for the majority of an atom's radius.
Which element is located in period 4?
Zirconium (Zr)
Silicon (Si)
Beryllium (Be)
Iron (Fe)
Two elements that have similar physical and chemical properties are most likely in the same...
period
row
group
Which element is most likely to have three electron energy levels?
Argon (Ar)
Lithium (Li)
Boron (B)
Europium (Eu)
Which element is most likely to have six valence electrons?
Barium (Ba)
Carbon (C)
Oxygen (O)
Americium (Am)
In which group would an element that is not reactive most likely be located?
1
2
16
18
In which group would an element that is very reactive most likely be located?
1
5
15
18
In which group would an element that is a gas most likely be located?
1
3
12
18
Which of the following elements is most likely a poor conductor of electricity?
Beryllium (Be)
Gold (Au)
Phosphorus (P)
Copper (Cu)
What is the atomic mass of an element with 16 protons, 13 neutrons, and 16 electrons?
13 amu
16 amu
29 amu
45 amu
How many neutrons are located in the nucleus of an atom that has 12 protons, 12 electrons, and an atomic mass of 28 amu?
12
16
28
40
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