A substance that can't be chemically broken down into simpler ...

[lb_gilbert]

A substance that can't be chemically broken down into simpler substances is considered to be
 
  A) a homogeneous mixture.
  B) an element.
  C) a heterogeneous mixture.
  D) a compound.
  E) water.

Question 2

Determine the number of protons, neutrons and electrons in the following: X
 
  A) p+ = 18 n = 18 e- = 22
  B) p+ = 18 n = 22 e- = 18
  C) p+ = 22 n = 18 e- = 18
  D) p+ = 18 n = 22 e- = 40
  E) p+ = 40 n = 22 e- = 18

Question 3

Which of the following statements about subatomic particles is true?
 
  A) A neutral atom contains the same number of protons and electrons.
  B) Protons have about the same mass as electrons.
  C) Electrons make up most of the mass of an atom.
  D) Protons and neutrons have opposite, but equal in magnitude, charges.
  E) Neutrons and electrons are found in the nucleus of an atom.

[Silverbeard98]

Answer to Question 1

B

Answer to Question 2

B

Answer to Question 3

A

[lb_gilbert]

Thanks

[Silverbeard98]

Welcome