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Atoms, ion, and isotopes - Chem 1 Honors

Total questions: 25

Worksheet time: 50mins

Name
Class
Date
1.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

2.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O-2

3.

What is the mass number of bromine?

a)

35

b)

45

c)

80

d)

79.904

4.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

5.

What type of atom is this?

a)

Neutral atom

b)

Cation

c)

Anion

d)

Isotope

6.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

7.

What type of atom is this?

a)

Normal Atom

b)

Cation

c)

Anion

d)

Isotope

8.

What is the mass number of this Neon atom?

a)

10

b)

11

c)

21

d)

20

9.

How many electrons does this magnesium ion have?

a)

24

b)

12

c)

10

d)

14

10.

What changes in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

11.

What is the representation of an isotope?

a)

N-3

b)

Al+3

c)

Si

d)

P-33

12.

How many neutrons does this Neon atom have?

a)

21

b)

11

c)

10

d)

12

13.

What is the atomic number of this element?

a)

12

b)

24

c)

23

14.

What type of atom is element C?

a)

Normal atom

b)

Ion

c)

Isotope

15.
Although carbon's three isotopes are carbon-12, carbon-13, and carbon-14, its average atomic mass is 12.01 because
a)
Carbon-12 is the heaviest isotope
b)
Carbon-12 is the most useful to humans
c)
Carbon-12 is the most common isotope
16.
A neutral atom would become an ion that has a charge of 2+ by 
a)
Losing two protons
b)
Losing two neutrons
c)
Losing two electrons
17.
Isotopes are atoms that have different
a)
Mass numbers
b)
Element names
c)
Atomic Numbers
18.
A positively charged ion is formed when
a)
A neutron is lost
b)
An electron is lost
c)
A neutron is gained
d)
An electron is gained
19.
Two atoms that have different numbers of protons are 
a)
Different ions
b)
Different isotopes
c)
Different elements
20.
If neutral copper atom (atomic number 29) becomes an ion that has a charge of 2+, how many electrons does the resulting ion have?
a)
27
b)
28
c)
29
d)
31
21.
Two neutral atoms that have the same atomic number and different mass numbers are
a)
Ions
b)
Isotopes
c)
Alpha particles
d)
Different elements
22.
An ion that has a negative charge is formed when an atom 
a)
Loses neutrons
b)
Loses electrons
c)
Gains neutrons
d)
Gains electrons
23.
What information would allow you to determine whether two atoms are of the same or different elements
a)
The charge on each atom
b)
The number of neutrons each has
c)
The number of protons in their nuclei
d)
The location of the electrons in their electron clouds
24.
Define Atom
a)
It is the smallest piece of an element that still represents that element
b)
Is an element has the electrons in their electron cloud
c)
A positively charged isotope
25.
How are Protons and Neutrons similar
a)
Both are in the nucleus of the atom and they both have the relative mass of 1
b)
They both have alpha particles and have the relative mass of 2
c)
They both have 1 high-energy electron and different elements

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