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WorksheetsAtomic Properties
Total questions: 23
Worksheet time: 16mins
Atoms of the same element with different number of neutrons are called
isotopes
metalloids
transition elements
radioactive
A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is _____.
26
30
52
56
What does the C represent?
atomic mass
atomic number
element name
element symbol
The atomic number of Re is 75. The atomic mass of one of its isotopes is 186. How many neutrons are in an atom of this isotope?
75
111
186
261
What is the atomic number of Nickel? (enlarge the periodic table)
110
28
46
78
An element has the mass number 12 and atomic number 6. The number of neutrons in it is:
6
10
4
8
How many neutrons does C-14 [atomic #6] contain? (tap to enlarge the image)
6
7
14
8
The number in Kr-84 represents what about Krypton?
The number of electrons
The number of protons
The mass number
How many electrons are in an atom with an atomic number of 50? You will need a periodic table to help you.
5
8
50
2
How many neutrons does the isotope of lithium - 8 have?
8
3
4
5
What is the atom with 49 e-, 49 p+, and 70 n0 ?
Indium-49
Indium-114
Indium-114.818
Indium-119
How many neutrons in the isotope shown?
82
210
128
209.98
How many electrons in Scandium-46
21
24
25
46
What is the mass number of Boron-12
12
11
5
7
Name this element.
Argon
Chlorine
Aluminum
Boron
