chapter 4

Question 1

atom

Answer 1

the smallest unit of an element that maintains the properties of an element

Question 2

electron

Answer 2

a subatomic particle that has a negative charge

Question 3

nucleus

Answer 3

in physical science, an atoms central region,wich is made up of protons andn neutrons

Question 4

electrons cloud

Answer 4

a region around the nucleus of an atom were electrons are likely to be found.

Question 5

proton

Answer 5

a subatomic particle that has a postive charge and that is found in the nuclus of an atom

Question 6

atomic mass unit

Answer 6

a unit of mass that describes the mass of an atom or molucul

Question 7

neutron

Answer 7

A SUB ATOMIC PARTICLE THAT HAS NO CHARGE AND THAT IS FOUND IN THE NUCLUS of an atom

Question 8

atomic nuber

Answer 8

the nuber of protons in the nucles of an atom the atomic nuberis the same for all atomsof an element

Question 9

isotope

Answer 9

an atom that has the same number of protons/or the the same atomic number/as other atoms of the same element
do but that has a diferent number of nutrons and thus a differnt atomic mass

Question 10

mass number

Answer 10

the sum of the numbers of protons and nutrons in the nucleus of an atom

Question 11

atomic mass

Answer 11

the mass of an atom expressed in atomic mass units