WorksheetsMoles, Molar Mass, & Vocab Warm Up
Total questions: 10
Worksheet time: 26mins
Name
Class
Date
1.
How many valence (outer) electrons does an Oxygen atom have?
a)
2
b)
6
c)
8
d)
16
2.
How many electrons does potassium K contain? (click to see image)
a)
19
b)
39
c)
20
d)
40
3.
An element is defined by its number of
a)
protons
b)
electrons
c)
neutrons
d)
protons + electrons
4.
Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses.
a)
protons, neutrons
b)
protons, electrons
c)
neutrons, protons
d)
electrons, protons
5.
How many valence electrons are in an atom of Ar?
a)
2
b)
8
c)
4
d)
1
6.
a unique number for each element that equals the number of protons in an atom of that element
a)
element name
b)
element symbol
c)
atomic number
d)
atomic mass
7.
the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom
a)
element name
b)
element symbol
c)
atomic number
d)
atomic mass
8.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
9.
How many water molecules are in 5.2 moles of water?
a)
6.02 x 1023
b)
5.2
c)
3.1304 x 1024
d)
8.638 x 10-24
10.
Which conversion factor should be used to solve the following, "Find the mass in grams of 2.00 x 1023 molecules of F2."
a)
1-Step Mole Conversion
b)
2-Step Mole Conversion
100 %
