WorksheetsUCEA 5.1 Atomic Structure Part 1
Total questions: 29
Worksheet time: 22mins
Name
Class
Date
1.
A substance that cannot be separated or broken down into simpler substances by chemical means is?
a)
Atom
b)
Element
c)
Compound
d)
Molecule
2.
The smallest unit of an element is?
a)
Element
b)
Compound
c)
Atom
d)
Molecule
3.
The arrangement of all know elements in order is called?
a)
Compounds
b)
Periodic Table
c)
Pure Substance
d)
Element
4.
What is the name of this element?
a)
K
b)
Potassium
c)
39.098
d)
19
5.
What is the chemical symbol of this element?
a)
Potassium
b)
K
c)
39.098
d)
19
6.
A NEGATIVE subatomic particle is:
a)
Electron
b)
Neutron
c)
Proton
d)
Metal
7.
A POSITIVE subatomic particle:
a)
Neutron
b)
Electron
c)
Atom
d)
Proton
8.
The central region of an atom where its neutrons and protons are is called the
a)
nucleus
b)
electron cloud
c)
core
d)
center
9.
Neutrons are
a)
negative
b)
positive
c)
neutral
d)
cows
10.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
11.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
12.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
13.
What is this?
a)
Compound
b)
Element
c)
Mixture of elements
d)
Mixture of compounds
14.
What is this?
a)
Compound
b)
Mixture of compounds and elements
c)
Mixture of compounds
d)
Mixture of elements
15.
What is this?
a)
Mixture of compounds and elements
b)
Compound
c)
Element
d)
Mixture of compounds
16.
What is this?
a)
Atom
b)
Element
c)
Mixture
d)
Compound
17.
What are these?
a)
Molecules
b)
Compounds
18.
Has a mass of 1/200th the mass of a proton.
a)
electron
b)
neutron
c)
nucleus
d)
electron cloud
19.
The particles of the atom you can find by knowing the atomic number.
a)
neutrons
b)
protons and electrons
c)
protons and neutrons
d)
atomic mass
20.
What is the atomic number of the atom pictured?
a)
9
b)
10
c)
18
d)
19
21.
What subatomic particles would you find in the nucleus of an atom?
a)
Protons only
b)
Protons and Neutrons
c)
Neutrons and Electrons
d)
Protons and Electrons
22.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
23.
Protons and Electrons balance the charge of an atom.
a)
True
b)
False
24.
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
a)
20
b)
10
c)
5
d)
25
25.
Which letter represents a proton?
a)
A
b)
B
c)
C
d)
D
26.
Which letter represents a neutron?
a)
A
b)
B
c)
C
d)
D
27.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
28.
What is the electron configuration of sodium?
a)
2.8
b)
2.8.2
c)
2.8.1
d)
11
29.
What is an isotope?
a)
A charged atom
b)
An atom with different amounts of neutrons
c)
An atom with different amounts of protons
d)
A neutral atom
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