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WorksheetsAtoms and Elements
Total questions: 16
Worksheet time: 8mins
Which of these element are found before Iron in the periodic table?
Cobalt
Copper
Potassium
Nickel
Manganese
The mass of Iodine is ______________.
53
126.9
17
5
Lithium is in the 1st column of the 2nd row. What is the atomic number for it?
6.941
2
3
1
If potassium has an atomic number of 19, then how many protons and electrons does it have?
19
38
1
18
The chemical symbol for Zinc is
zn
ZN
Zn
zN
What family (or column) of the periodic table is He?
alkaloid
metal
noble gas
halogen
How many valence electrons does Si have?
2
10
1
4
How many valence electrons does phosphorus have?
2
5
4
3
How many valence electrons does Aluminum have?
3
2
1
4
How many valence electrons does magnesium have?
1
2
3
4
Sodium and Potassium are in the same group on the periodic table. How many valence electrons does potassium have?
6
2
0
1
Krypton has 36 as its atomic number. The mass is 84. How many neutrons does it have?
36
84
48
18
The MASS of an atom is equal to
protons and electrons
electrons and neutrons
protons and neutrons
proton, electrons and neutrons
To find the CHARGE of an atom, you add the charges of
protons and electrons
protons and neutrons
electrons and neutrons
protons, electrons and neutrons
Atomic mass - protons = neutrons. How many neutrons are in Iodine?
127
74
53
180
Mercury is in the 80th position on the periodic table. How many protons does it have?
200.59
40
20
80
