Atomic Number, Atomic Mass and Isotope Practice
Authored by Jess Racine
Chemistry
9th - 12th Grade
NGSS covered
Used 8+ 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 17 protons in its nucleus
chlorine, Cl
most comon isotope has 6 neutrons
carbon, C
most common isotope has a mass of 24
fluorine, F
noble gas
magnesium, Mg
has 9 electrons in a neutral atom
neon, Ne
Tags
NGSS.MS-PS1-1
3.
LABELING 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
nucleus
the mass of the atom is found here
neutrons
these are in the nucleus
element
if you change the number of neutrons you get a different...
mass
if you change the number of protons you get a different...
protons & neutrons
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.
LABELING QUESTION
15 mins • 3 pts
Label the following isotope symbol. Not all labels will be used!
Element Symbol
number of neutron
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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