NEW
Font size
S
M
L
XL
WorksheetsConner 8th Grade STAAR Review #4
Total questions: 64
Worksheet time: 49mins
Name
Class
Date
1.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
2.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
3.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
4.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
5.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
6.
True or False? Neutrons have a negative charge
a)
True
b)
False
7.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
8.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
9.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
10.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
11.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
12.
The first energy level can hold up to how many electrons?
a)
8
b)
4
c)
2
d)
5
13.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
14.
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.
15.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
16.
What is the atomic symbol for sodium?
a)
Na
b)
So
c)
NaCl
d)
S
17.
How many neutron are in the atom "K"?
a)
7
b)
2
c)
39
d)
12
18.
What the number of eletrons that this carbon have?
a)
10
b)
12
c)
6
d)
14
19.
What are the 3 particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
20.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
21.
How many electrons are in the outer shell of Sodium?
a)
1
b)
8
c)
2
22.
How many electrons are in the outside of Carbon?
a)
4
b)
8
c)
6
23.
The first element on the periodic table is:
a)
Hydrogen
b)
Helium
c)
Oxygen
24.
Which of these has 1 valence electron?
a)
Carbon
b)
Lithium
c)
Neon
d)
Oxygen
25.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
26.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
27.
Element or compound?
O2
O2
a)
Element
b)
Compound
28.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
29.
Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
30.
How many elements are in H2O?
a)
1
b)
2
c)
3
d)
4
31.
Which of the following is NOT an element?
a)
H2O
b)
H2
c)
O2
d)
Au
32.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
33.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
34.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
35.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
36.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
37.
In a chemical reaction, everything to the rightof the arrow is called ______________.
a)
Products
b)
Yields
c)
Molecules
d)
Reactants
38.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
39.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
Fe + S --> FeS
a)
balanced
b)
unbalanced
40.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
41.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
42.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
43.
An atom is
a)
An Electron particle
b)
A Proton particle
c)
A basic particle of matter
d)
A molecule
44.
Which of these is in the nucleus of an atom?
a)
Electron and Proton
b)
Proton and Neutron
c)
Neutron and Electron
d)
Only Protons
45.
You can determine how many neutrons an element has by doing this:
a)
Add together the atomic number and the mass
b)
Subtract the number of protons from the number of electrons
c)
Add the mass and the atomic number
d)
Subtract the atomic number from the atomic mass
46.
Which of these is NOT an element?
a)
Carbon
b)
Gold
c)
Hydrogen
d)
Particle
47.
The Periodic Table of the Elements shows
a)
All the elements in the universe.
b)
Most of the elements in the universe.
c)
The elements found on Earth.
d)
Most of the elements found on Earth.
48.
Look at carbon in the Periodic Table. How many electron shells does carbon have?
a)
1
b)
2
c)
3
d)
All its electrons are in one shell.
49.
Look at sodium in the Periodic Table. How many electron shells does sodium have?
a)
1
b)
2
c)
3
d)
All its electrons are in one shell.
50.
How did Mendeleev arrange the elements?
a)
alphabetical
b)
density
c)
melting point
d)
atomic mass
51.
The horizontal row on the periodic table is called a
a)
group
b)
family
c)
period
d)
atomic number
52.
A vertical column is called...
a)
group
b)
tower
c)
period
d)
crew
53.
The number at the bottom of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
chemical symbol
d)
element name
54.
The number at the top of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
Chemical Symbol
d)
Element Name
55.
What is the chemical symbol for Lithium?
a)
H
b)
He
c)
Li
d)
N
56.
How many elements follow the periodic law?
a)
7
b)
98
c)
110
d)
All of them
57.
A rule that states that repeating chemical and physical properties of elements change periodically with the atomic number of the elements is the _________.
a)
periodic law
b)
alkaline-earth metals
c)
actinide
d)
group rule
58.
Diamonds are a pure form of what element?
a)
Carbon
b)
Oxygen
c)
Silicon
d)
Silver
59.
Most of the elements on the periodic table are classified as _____.
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Periods
60.
A ___________ is an arrangement of elements in columns
a)
columns
b)
rows
c)
periodic table
d)
electron shell
61.
Which group of the periodic table is composed of inert (not reactive) gases?
a)
alkali metals
b)
alkaline earth metals
c)
halogens
d)
noble gases
62.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
63.
Which element is not a metal?
a)
H
b)
Re
c)
Al
d)
B
64.
The atoms along the staircase are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
Reset
