Chemistry 9

Which of the following does the nucleus contain?

• protons and electrons

• protons and neutrons

• elements and compounds

• neutrons and electrons

Oxygen, 16 8 O, occurs before neon, 20 10 Ne, in the periodic table because oxygen

• is a better oxidising agent than neon

• has fewer protons on its atom than neon

• reacts with metals more readily than neon

• has a smaller relative atomic mass than neon

What is the atomic number of an atom?

• The number of atoms it contains.

• The number of protons it contains.

• The atomic number

• The number of neutrons it contains.

Which of the following statements is true of an atom?

• The number of protons is always equal to the number of neutrons.

• The number of protons is always equal to the number of electrons.

• The number of neutrons is always equal to the number of electrons.

• The number of electrons and protons are never equal

Two elements have these electronic structures: 2,1 and 2,8,1. What can you say about the elements?

• They are both in Group 1.

• They are both in Group 2.

• They are both in period 2.

• They have nothing in common

Which electronic structure is correct for an element with 17 electrons?

• 1, 7

• 10, 7

• 2,8,7

• 7,10

Ionic bonding is formed by?

• The sharing of protons

• The sharing of electron

• The transfer of electrons

• The transfer of neutrons

All of the following are states of matter EXCEPT:

• solid

• liquid

• gas

• putty

Matter changing from a solid to a liquid is called:

• evaporation

• sublimation

• deposition

• melting

Which of the following is NOT a way that matter changes phase?

• Melting

• freezing

• evaporation

• mixing