Atomic Number, Atomic Mass and Isotope Practice
Authored by Jess Racine
Chemistry
9th - 12th Grade
NGSS covered
Used 7+ times
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10 questions
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1.
DROPDOWN QUESTION
15 mins • 1 pt
The most common isiopte of gallium has a mass number of (a)
Tags
NGSS.MS-PS1-1
2.
MATCH QUESTION
15 mins • 5 pts
Match the following elements to the correct description
has 9 electrons in a neutral atom
carbon, C
most comon isotope has 6 neutrons
neon, Ne
noble gas
magnesium, Mg
has 17 protons in its nucleus
chlorine, Cl
most common isotope has a mass of 24
fluorine, F
Tags
NGSS.MS-PS1-1
3.
LABELLING QUESTION
15 mins • 5 pts
Label the parts of the atom. Not all labels will be used!
Tags
NGSS.MS-PS1-1
4.
MATCH QUESTION
15 mins • 5 pts
Match the following descriptions to the best term
protons & neutrons
if you change the number of protons you get a different...
nucleus
if you change the number of neutrons you get a different...
element
the mass of the atom is found here
neutrons
these are in the nucleus
mass
an isotope has the same number of protons but a different number of...
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The most common isotope of sodium has how many neutrons?
23
11
2, 8, 1
12
Tags
NGSS.MS-PS1-1
6.
LABELLING QUESTION
15 mins • 3 pts
Label the following isotope symbol. Not all labels will be used!
number of neutron
Element Symbol
Mass Number
Atomic number
Tags
NGSS.MS-PS1-1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A certain atom of oxygen contains 8 protons, 8 neutrons, & 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom?
It has 9 neutrons in its nucleus.
It is an isotope of oxygen.
Its atomic mass is a decimal number.
It cannot be an atom of oxygen.
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