Q.1
How many energy levels does chlorine have?
  • none
  • 1
  • 2
  • 3
Q.2
How many protons does magnesium have?
  • 7
  • 12
  • 21
  • none of the above
Q.3
What is the atomic number of silicon?
  • 7
  • 14
  • 21
  • none of the above
Q.4
What is the chemical symbol for oxygen?
  • Ox
  • O X
  • O
  • Oxy
Q.5
What is the chemical symbol for oxygen?
  • Ox
  • O X
  • O
  • Oxy
Q.6
In what part of the atom is the electron found?
  • energy level
  • nucleus
  • neutrons aren't part of atoms
Q.7
In what part of the atom is the electron found?
  • energy level
  • nucleus
  • neutrons aren't part of atoms
Q.8
What is the electrical charge on a electron?
  • positive
  • negative
  • neutral
Q.9
What is the electrical charge on a proton?
  • positive
  • negative
  • neutral
Q.10
What is the electrical charge on a proton?
  • positive
  • negative
  • neutral
Q.11
A pure substance that is made up of two or more types of atoms that are joined together is called a(n) _____________________.
  • compound
  • element
  • mixture
  • ion
Q.12
A pure substance that is made up of two or more types of atoms that are joined together is called a(n) _____________________.
  • compound
  • element
  • mixture
  • ion
Q.13
Water is a _______________ because it can be broken down into the _____________ oxygen and hydrogen.
  • molecule, compounds
  • element, molecules
  • atom, elements
  • compound, elements
Q.14
Water is a _______________ because it can be broken down into the _____________ oxygen and hydrogen.
  • molecule, compounds
  • element, molecules
  • atom, elements
  • compound, elements
Q.15
Substances that contain particles that are the same throughout are
  • pure substances
  • heterogeneous mixtures
  • heterogeneous compounds
Q.16
Substances that contain particles that are the same throughout are
  • pure substances
  • heterogeneous mixtures
  • heterogeneous compounds
Q.17
A _____________ can be solid, brittle, non-conductive, and dull.
  • metal
  • non-metal
Q.18
A _____________ can be solid, brittle, non-conductive, and dull.
  • metal
  • non-metal
Q.19
A star that could float on water,
  • it is more dense than water.
  • it is less dense than water.
  • its density is equal to that of water.
Q.20
Bags made out of cellulose eventually dissolve in water. This means that they are
  • soluble
  • malleable
  • ductile
  • conductivity
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