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Worksheets3-1 and 3-2 review
Total questions: 12
Worksheet time: 10mins
Name
Class
Date
1.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
2.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
3.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
4.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
5.
The particles that are found in the nucleus of an atom are
a)
neutrons and electrons
b)
electrons only
c)
protons and neutrons
d)
protons and electrons
6.
What element contains 26 protons?
a)
Iron
b)
Sodium
c)
Aluminum
d)
Helium
7.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
8.
a)
Periods
b)
Groups
9.
a)
Periods
b)
Groups
10.
How did Mendeleev arrange the elements?
a)
atomic number
b)
density
c)
melting point
d)
atomic mass
11.
Why did Mendeleev leave blanks in his periodic table?
a)
forgot elements
b)
left room for elements not yet discovered
c)
placed elements in wrong positions leaving gaps
12.
Elements in a ..................have similar chemical properties.
a)
period
b)
group
c)
row
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