Download Atomic Structure Review 1. The atomic number tells you the number

Atomic Structure Review
1. The atomic number tells you the number of protons and electrons in one atom of
an element.
2. The atomic mass minus the atomic number will tell you the number of
neutrons in one atom of an element. When you have more or less neutrons
than this number, you have an isotope of an element.
3. The atomic mass of an element is the total number of protons and neutrons and is found in
the nucleus of the atom.
4.
The number electrons in the outermost energy level of an atom are called
valence electrons.
5. The nucleus of most atoms is composed of protons and neutrons .
6. Valence electrons are important because they are the electrons that have the
capacity to react with other atoms in chemical reactions.
7. The two forces that hold an atom together are 1)
2)
nuclear
electromagnetic
8. Which British scientist proposed the ‘modern day atomic theory’:
a. Davey Jones
c. John Dalton
b. John Milton
d. Sir Alec Guiness
9. The Greek philosopher who developed the first concept of atomic theory was:
a. Aristotle
c. Democritus
10.
b. Plato
d. Hippocrates
forces
forces.
11. Fill in the isotope table below with the correct information:
Isotope
No. of Protons
No. of Neutrons
Element
Notation
(new atomic mass minus no. of p+)
Symbol (with new atomic mass)
Element
Name
Iron
Fe
Fe - 58
26
32
Strontium
Tin
Sr
Sn
Sr - 84
Sn - 124
38
50
46
74
Zinc
Zn
Zn - 64
30
34
12. Fill in the table below with the correct information:
Element
Symbol
Ag
Atomic
Mass
108
Atomic
No./
Protons
47
Cobalt
Co
59
27
32
27
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
4d9
1s2 2s2 2p6 3s2 3p6 4s2 3d7
Selenium
Se
79
34
45
34
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
6
Boron
Scandium
B
Sc
11
45
5
21
6
24
5
21
1s2 2s2 2p1
1s2 2s2 2p6 3s2 3p6 4s2 3d1
3
2
Element
Name
Silver
Electron Configuration
No. of
Neutrons
61
No. of
Electrons
47
No. of
Valence
Electrons
2
2
13.
14.
Magnesium ( Mg ) is on row 3 of the periodic table. Magnesium has 3 primary energy levels and 2 valence
electrons.
Lead (Pb) is on row 6 of the periodic table. Element Pb has 6 primary energy levels and 4 valence electrons.
Bromine (Br) is on column 17 of the periodic table. Bromine has 4 primary energy levels and 7 valence electrons.