Chapter 4 Vocab

Question 1

the dense, positively charged mass located in the center of an atom

Answer 1

nucleus

Question 2

a positively charged subatomic particle that is found in the nucleus of an atom

Answer 2

proton

Question 3

a negatively charged subatomic particle that is found in the nucleus of an atom

Answer 3

electron

Question 4

a neutral subatomic particle that is found in the nucleus of an atom

Answer 4

neutron

Question 5

a unique number for each element that equals the number of protons in an atom of that element

Answer 5

atomic number

Question 6

the sum of the number of protons and neutrons in the nucleus of an atom

Answer 6

mass number

Question 7

atoms of a given element that have different numbers of neutrons and different mass numbers

Answer 7

isotopes

Question 8

the possible energies that electrons in an atom can have

Answer 8

energy levels

Question 9

a visual model of the most likely locations for the electrons in an atom

Answer 9

Electron cloud

Question 10

a region of space around the nucleus where an electron is likely to be found

Answer 10

orbital

Question 11

the arrangement of electrons in the orbitals of an atom

Answer 11

electron configuration

Question 12

a state in which all the lectrons in an atom have the lowest possible energies

Answer 12

ground state