FREE NEX Basic Chemistry: Atomic Structure and Chemical Reactions Questions and Answers

Question 1

Which subatomic particle has a negative charge and orbits the nucleus of an atom?

Accepted Answer

Electron

Answer

Proton

Answer

Neutron

Answer

Photon

Question 2

The atomic number of an element is determined by the number of ___ in one atom of that element.

Accepted Answer

protons

Answer

neutrons

Answer

electrons

Answer

ions

Question 3

In the chemical reaction Zn + 2HCl → ZnCl₂ + H₂, the products are:

Accepted Answer

ZnCl₂ and H₂

Answer

Zn and HCl

Answer

Zn and ZnCl₂

Answer

HCl and H₂

Question 4

Isotopes of an element are atoms that have the same number of protons but a different number of ___.

Accepted Answer

neutrons

Answer

electrons

Answer

quarks

Answer

ions

Question 5

The reaction 2H₂O → 2H₂ + O₂ is an example of which type of reaction?

Accepted Answer

Decomposition

Answer

Synthesis

Answer

Single displacement

Answer

Combustion

Question 6

When the equation __N₂ + __H₂ → __NH₃ is balanced, what is the coefficient for H₂?

Accepted Answer

3

Answer

1

Answer

2

Answer

6