foundations of chemistry

Question 1

what is chemistry.

Answer 1

is the organized study of the composition and interactions of matter

Question 2

the foundation for understanding of matter

Answer 2

atomic theory of matter

Question 3

atoms

Answer 3

all matter consists of tiny particles

Question 4

some substances are called are composed of a single type of atom

Answer 4

elements

Question 5

are composed of atoms of two or more elements bonded together

Answer 5

compounds

Question 6

usually based on there latin name

Answer 6

chemical symbol

Question 7

it became clear that atoms are composed of still smaller particles of matter called

Answer 7

subatomic particles

Question 8

every atom has a dense central core the

Answer 8

nucleus

Question 9

carry a positive electric charge

Answer 9

protons

Question 10

the number of protons in the nucleus is the atoms

Answer 10

atomic number

Question 11

is electrically neutral having no electric charge

Answer 11

neutron

Question 12

atoms that are the same element but have different numbers of nuetrons are

Answer 12

isotopes

Question 13

any of a number of subatomic particles carrying a fractional electric charge, postulated as building blocks of the hadrons

Answer 13

quarks

Question 14

is found outside of the nucleus and carries a negative electric charge equal in strength to the positive charge of a neutron

Answer 14

electron

Question 15

can hold only a certain amount of electrons

Answer 15

electron shell

Question 16

an atoms is the total number of protons and neutrons in the nucleus

Answer 16

mass number

Question 17

an atom that has an electric charge because of losing or gaing electrons is an

Answer 17

ion

Question 18

the mass of an atom in an atomic mass units is approximately equal to the mass number

Answer 18

atomic mass units

Question 19

the is the average mass of all the natural isotopes of an element calculated according to the isotopes relative abundances

Answer 19

average mass number