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Atoms and the Periodic Table
Atoms and the Periodic Table
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1
What particles are inside the nucleus of an atom?
protons
neutrons
all
electrons
2
How many valence electrons are in the element Ne?
8
18
20.180
10
3
What does the period number tell you?
energy levels
atomic mass
atomic number
valence electrons
4
How many total electrons are in Ne?
18
8
10
20
5
A neutron has a _________ charge.
negative
positive
neutral
electrical
6
Boron has ____ protons.
11
5
10
3
7
How many valence electrons are in Oxygen?
2
8
16
6
8
Which element is more reactive?
Ar
Li
C
Sg
9
Which elements are more reactive?
Group 8
Group 2
Groups 1 and 7
Group 3 and 8
10
What is the rounded atomic mass number for Mg?
25
24
12
2
11
How do you find the # of neutrons in an atom?
Group number
Period number
atomic number
atomic mass - atomic number=
12
What is the atomic symbol for Potassium?
K
Pt
19
P
13
How many electrons are in Sodium (Na)?
1
12
11
3
14
Which has a + charge?
neutron
proton
electron
an atom
15
Where are the most stable elements located on the periodic table?
group 8
group 1
group 7
group 3
16
How many Valence electrons are in H
2
1
1.008
0
17
Where do you find the group number?
atomic mass
the Rows
atomic number
the Columns
18
Which element is a Noble Gas?
H
Li
O
Kr
19
How many energy levels does Helium have?
2
1
8
4
20
How many neutrons are in Lithium?
3
1
4
7
