ch 2 ( molecules )

Question 1

matter

Answer 1

has a form and takes up space

Question 2

types of matter

Answer 2

liquid, solid, gas

Question 3

atom

Answer 3

the smallest particle that exhibits the chemical properties of an element

Question 4

how many naturally occurring elements are there?

Answer 4

92

Question 5

3 subatomic particles of an atom

Answer 5

electrons, protons, neutrons

Question 6

2 major differences in subatomic particles

Answer 6

mass and charge

Question 7

the AMU ( or dalton) is?

Answer 7

atomic mass unit

Question 8

what 2 of the 3 sub particles have an AMU of 1

Answer 8

neutron and proton

Question 9

which particles are neutral? positive? negative?

Answer 9

neutron- neutral , proton- positive, electron- negative

Question 10

neutrons and protons make up what? what is the total charge of that?

Answer 10

atomic nucleus and is positive charge

Question 11

one electron has a AMU and charge of what?

Answer 11

1/1800 AMU , negative

Question 12

where are electrons found?

Answer 12

varying distances called orbitals

Question 13

what is the chemical symbol?

Answer 13

the letter representing an element of the periodic table. starts with capitol letter and is sometimes followed by one lower case letter.

Question 14

what is the atomic number? and where is it?

Answer 14

the number of protons in an element, found above the chemical symbol.

Question 15

what is atomic mass/weight and where is it found?

Answer 15

the total mess of the protons and neutrons in an atom of that element, found under the chemical symbol

Question 16

how can you determine the exact number of protons, neutrons, and electrons in an atom

Answer 16

Proton number (p)= Atomic number
Neutron number (n)= Atomic mass (p + n) − atomic 
             number (p)
 Electron number (e)= Proton number (p)

Question 17

what are the limits of each electron shell ring?

Answer 17

inner most holds up to 2, all other shells up to 8,

Question 18

isotope is?

Answer 18

different atoms of the same element that have different number of neurons