Ch22 The Nucleur Atom

Question 1

Define ionization:

Answer 1

When a particle (molecule or atom) becomes electrically charged by losing/gaining electrons

Question 2

Define plum pudding model:

Answer 2

A disprove model of the atom which imaged it to consist of a positive “pudding” with electrons dotted through it

Question 3

Define alpha particle (α-particle):

Answer 3

A particle made up of two protons and two neutrons;
it is emitted by an atomic nucleus during radioactive decay

Question 4

Define nucleus:

Answer 4

A small, dense, positively charged region at the center of an atom

Question 5

Define proton:

Answer 5

The positively charged particle found in the atomic nucleus

Question 6

Define neutron:

Answer 6

An uncharged particle found in the atomic nucleus

Question 7

Define nucleon:

Answer 7

A particle found in the atomic nucleus; a proton or a neutron

Question 8

Define relative charge:

Answer 8

The charge of a particle relative to the charge of a proton

Question 9

Define relative mass:

Answer 9

The mass of a particle relative to the mass of a proton

Question 10

Define proton number (Z) / atomic number:

Answer 10

The number of protons in an atomic nucleus

Question 11

Define nucleon number (A) / mass number:

Answer 11

The number of nucleons (protons, and neutrons) in an atomic nucleus

Question 12

Define neutron number (N):

Answer 12

Number of neutrons in the nucleus of an atom

Question 13

Define isotope:

Answer 13

Isotopes of an element have the same proton number, but different nucleon numbers

Question 14

Define isotope:

Answer 14

Isotopes of an element have the same proton number, but different nucleon numbers