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2.1 Atomic structure and the Periodic Table [Must do]

Total questions: 22

Worksheet time: 15mins

Name
Class
Date
1.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

2.

What is one way Neutrons are different from electrons?

a)

they both are negative

b)

neutrons have no charge, while electrons have a negative charge

c)

Both are in the nucleus( center of atom)

d)

Electrons are inside nucleus and neutrons are outside the nucleus.

3.

Match the Following

a)

Element

1.

A substance that cannot be broken down into simpler substances by physical or chemical means.

b)

Atom

2.

The smallest unit of an element that keeps the element’s chemical properties.

c)

Nucleus

3.

The dense center of an atom containing protons and neutrons.

d)

Proton

4.

Positively charged particles found in the nucleus of an atom.

e)

Neutron

5.

Particles with a neutral charge found in the nucleus of an atom.

4.
Value representing the number of protons in an element
a)
Atomic Mass
b)
Mass Number
c)
Valence Electrons
d)
Atomic Number
5.
Measure mainly of the nuclear particles: protons + neutrons
a)

Subatomic Particles

b)

Atomic Number

c)

Mass Number

d)

Gluons

6.
A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass
a)
Electron Shells
b)
Orbitals
c)
Electron Cloud
d)
Nucleus
7.
Discovered the electron within the atom
a)

J.J. Thomson

b)
Chadwick 
c)

Ernest Rutherford

d)

Niels Bohr

8.
The only element with no neutrons in its nucleus.
a)
Oxygen
b)
Helium 
c)
Hydrogen
d)
Lithium
9.
For an atom to be electrically neutral, it must contain the same number of _____
a)
protons and neutrons
b)
neutrons and electrons
c)
protons and electrons
d)
nucleons and electrons
10.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

11.
Place the following scientists in order, from earliest to latest: 
Rutherford, Dalton, Bohr, Thomson
a)
Dalton, Rutherford, Bohr, Thomson
b)
Thomson, Dalton, Rutherford, Bohr
c)
Dalton, Thomson, Rutherford, Bohr
d)
Bohr, Dalton, Rutherford, Thomson
12.
The mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.
a)
12.5
b)
13
c)
25
d)
37
13.
Which subatomic particle has a positive (+) charge?
a)
Neutron
b)
Proton
c)
Electron
14.
Which subatomic particle has a neutral or no charge?
a)
Proton
b)
Electron
c)
Neutron
15.
Where are the Electrons found in the structure of an atom?
a)
In the nucleus
b)
In spaces around the nucleus
16.

Using a periodic table, order the following elements by mass number, least to greatest.

a)

Hydrogen

b)

Boron

c)

Fluorine

d)

Aluminium

e)

Sulfur

1)
2)
3)
4)
5)
17.

How many electron shells does the pictured atom have?

a)

1

b)

2

c)

3

d)

4

18.
Which two subatomic particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Neutrons and Electrons
c)
Electrons and Protons
d)
Protons and Neutrons
19.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

20

b)

10

c)

35

d)

25

20.
The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.
a)
9
b)
10
c)
19
d)
28
21.
An element with a mass number of 11 and an atomic number of 5 has how many neutrons?
a)
11
b)
5
c)
6
d)
16
22.
What is the atomic number of the atom pictured? 
a)
9
b)
10
c)
18
d)
19

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