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STAAR Cat 1 Quizizz 1

Total questions: 30

Worksheet time: 2hrs 30mins

Name
Class
Date
1.
Which of the following is a subatomic particle with no charge that is found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
2.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
3.
The sum of the protons and neutrons in the nucleus of an atom
a)
Atomic Number
b)
Compound
c)
Electrons
d)
Mass Number (also called Atomic Mass)
4.
What element is represented in this Bohr Model? 
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
5.

What are valence electrons?

a)

electrons in the second energy level

b)

electrons in the outermost energy level

c)

the atomic number

d)

electrons in the first level

6.

How many neutrons are in this element?

a)

15

b)

16

c)

22

7.
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
8.

Why do scientists use models to study atoms?

a)

There are way too many atoms to study

b)

Atoms are too far away to study directly

c)

Atoms are too small to study directly

d)

Atoms make up everything so they are impossible to study

9.

Which of the following statements is true about protons?

a)

Protons are inside the nucleus and have no charge.

b)

Protons are outside the nucleus and have no charge.

c)

Protons are inside the nucleus and have a positive charge.

d)

Protons are outside the nucleus and have a negative charge.

10.

How do electrons compare to protons?

a)

Electrons have the same mass as protons but an opposite charge.

b)

Electrons have the same mass and charge as protons

c)

Electrons have very little mass compared to the protons but the same charge.

d)

Electrons have very little mass compared to the protons and opposite charge.

11.

LT9: If an atom has 12 protons, which of the following must it also have to be considered a neutral atom?

a)

12 neutrons

b)

12 electrons

c)

12 protons

d)

24 protons and neutrons

12.

LT1: Most of the mass of an atom is found in the ______.

a)

nucleus

b)

proton

c)

electron cloud

d)

isotope

13.

How many Hydrogen atoms are in 4H2O?

a)

6

b)

8

c)

2

d)

4

14.

How many Oxygen atoms are in H2O?

a)

1

b)

2

c)

0

d)

4

15.

How many Magnesium atoms are in 10MgCl2?

a)

10

b)

5

c)

20

16.

How many different ELEMENTS are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

17.

How many atoms are there TOTAL in H2SO4 ?

a)

6

b)

5

c)

7

d)

3

18.

How many Nitrogen atoms are in (NH₄)₂CrO₄?

a)

1

b)

2

c)

8

d)

16

19.

How many Oxygen atoms are in Al₂(SO₄)₃?

a)

4

b)

12

c)

7

d)

24

20.

A coefficient tells us the number of ____________ in a chemical formula?

a)

atoms

b)

elements

c)

compounds

d)

molecules

21.

How many Nitrogen atoms are in the in NH4NO3?

a)

2

b)

1

c)

7

d)

4

22.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
23.

What kind of substance is composed of two or more elements that are chemically combined?

a)

element

b)

mixture

c)

solution

d)

compound

24.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
25.

Air is made up of molecules of different gases that are not joined chemically. Which term best describes air?

a)

compound

b)

mixture

c)

pure substance

d)

element

26.
Which one is an element?
a)
Co
b)
CO
c)
CO2
d)
CO3-2
27.
Which of the following properties uniquely identifies every element?
a)
Number of valence electrons
b)
Phase at room temperature
c)
Number of protons
d)
Charge of the atom
28.
An elements reactivity and other chemical properties are determined by the number of….
a)
isotopes it has.
b)
oxidation states
c)
orbitals in an atom.
d)
valence electrons
29.
Molybdenum has an atomic number of 42. This means that  molybdenum...
a)
has a freezing point of 42 degrees Fahrenheit.
b)
belongs to Group 42 on the Periodic Table.
c)
Can form 42 bonds with other atoms.
d)
contains 42 protons in its nucleus.
30.
Which pair of elements have the same number of valence electrons?
a)
Lithium and Beryllium
b)
Magnesium and Sodium
c)
Lithium and Sodium
d)
Magnesium and Lithium

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