NEW
Font size
S
M
L
XL
WorksheetsPhysical Science
Total questions: 21
Worksheet time: 25mins
Name
Class
Date
1.
The positively charged particle in the center of an atom is called the ___.
a)
proton
b)
electron
c)
neutron
d)
quark
2.
The electron has a ___.
a)
negative charge
b)
neutral charge
c)
positive charge
d)
static charge
3.
Where is most of the MASS of an atom located?
a)
In the nucleus
b)
Electron cloud
c)
In the electron
d)
Evenly spread throughout the atom
4.
The atomic number of an element that has 6 protons and 8 neutrons is ___.
a)
6
b)
2
c)
8
d)
14
5.
Fluorine is atomic number 9, and has a mass of 19. How many neutrons would it have?
a)
9
b)
6
c)
19
d)
10
6.
How many Hydrogen (H) atoms are in NH3O5
a)
3
b)
4
c)
5
d)
1
7.
Name the part in red:
H2 + O2 -> H2O
H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Reactant
d)
Subscript
8.
Name the part in red:
H2 + O2 -> H2O
H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Reactant
d)
Subscript
9.
Is the following equation balanced or unbalanced ?
N2 +3 H2 --> 2NH3
N2 +3 H2 --> 2NH3
a)
Balanced
b)
Unbalanced
10.
Is the following equation balanced or unbalanced ?
Al + O2 --> Al2O3
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
11.
In an Exergonic reaction, heat is ________.
a)
Absorbed
b)
Created
c)
Destroyed
d)
Released
12.
In an Endergonic reaction, heat is ________.
a)
Released
b)
Absorbed
c)
Created
d)
Destroyed
13.
What is the energy needed to start an chemical reaction referred to?
a)
Cascading Energy
b)
Potential Energy
c)
Kinetic Energy
d)
Activation energy
14.
What is being represented by the letter A in the image?
a)
Substrate
b)
Enzyme
c)
Product
d)
Complex
15.
What does "polar" mean?
a)
A molecule is cold
b)
A molecule has ionic bonds
c)
A molecule has covalent bonds
d)
A molecule has areas of positive and negative charge
16.
When two substances are mixed, the substance that is dissolved is called the:
a)
solvent
b)
solute
17.
molecule in which opposite ends have opposite electric charges
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
18.
What do you call any substance that dissolves another substance?
a)
Solvent
b)
Height
c)
Atoms
d)
Oxygen
19.
Which of these pH values represent an acid?
a)
4
b)
8
c)
10
d)
12
20.
Which of the following pH values represents a base?
a)
2.1
b)
4.6
c)
6.8
d)
8.1
21.
The strongest bases have pH values close to
a)
0
b)
14
c)
7
d)
5
Reset
