2

nucleus

1 3 4

ATOMIC STRUCTUREATOMIC STRUCTURE44 Atomic mass

22Atomic number

number of electrons

number of protons

The sum of protons and neutronsin an atom

Number of Protons in an atom

number of neutrons

Atomic massAtomic numberAtomic mass

protonAtomic mass

electron

2

ELECTRONIC CONFIGURATIONELECTRONIC CONFIGURATIONthe arrangement of the electron in the atom.Electrons are arranged in Energy Levels or Shells around

the nucleus of an atom.

nucleus

1 3 4s

d f

sp

sp d

ps

Atomic orbital

f = 7

d = 5p = 3s = 1

1 Atomic orbital = 2 e-

x 2 = 2x 2 = 6x 2 = 10

x 2 = 14

2e- 8e- 32e-

Main energy level

Subenergy level

no.of electrons

18e-

Given the Element 13

27Complete the missing data.

p+

e-

n0

Number of Location in the

atom

1)

2)

3)

4)

5)

6)

7. The maximum number of electrons that can be contained in an atomic orbital is

8. The particles in an atomic nucleus are collectively known as _______

Multiple choice

a. 2

a. Nucleus c. Nucleolusb. Nucleons

b. 8 c. 6

9. There are __ orbitals in the 3rd energy level.

10. The total number of electrons in the 4th energy level

a. 10 b. 16 c. 3

a. 36 b. 28 c. 32

Given the Element 13

27 Complete the missing data.

p+

e-

n0

Number of Location in the

atom

1)

2)

3)

4)

5)

6)

13

13

14

Inside the nucleus

Inside the nucleus

Electron cloud

a. Nucleus c. Nucleolus

7. The maximum number of electrons that can be contained in an atomic orbital is

8. The particles in an atomic nucleus are collectively known as _______

Multiple choice

b. 8 c. 6

b. Nucleons

a. 2

9. There are a total of __ orbitals in the 3rd energy level.

10. The total number of electrons in the 4th energy level

b. 16 c. 3

c. 32

a. 10

a. 36 b. 28

Please don’t forget to bring your copy of the periodic table tomorrow

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