the atom lesson 2 chemistry

Question 1

atomic number

Answer 1

number of protons unique to each element on the period table

Question 2

isotopes

Answer 2

atoms of the same type of element but with different numbers of neutrons

Question 3

mass number

Answer 3

the sum of protons and neutrons in a particular isotopes of an element

Question 4

atomic mass

Answer 4

the average mass of the atoms of that element

Question 5

element

Answer 5

ways of writing a particular isotope

Question 6

key formulas

Answer 6

number of protons = atomic number, mass number = protons and neutrons

Question 7

number of electrons

Answer 7

same number of protons

Question 8

where is all the mass of the atom?

Answer 8

nucleus

Question 9

what is a protons charge?

Answer 9

positive

Question 10

what is a neutrons charge

Answer 10

neutral

Question 11

what is an electrons charge

Answer 11

negative

Question 12

what is an excited atom?

Answer 12

electrons move to a higher energy level

Question 13

what is released when an atom loses energy?

Answer 13

light

Question 14

what subatomic particles change the identity of the atom

Answer 14

proton

Question 15

what subatomic particle will change the overall charge of an atom

Answer 15

electron

Question 16

what does the slider do?

Answer 16

changes the speed of electrons

Question 17

what is the motion of the electrons around the nucleus of an atom?

Answer 17

randomly appears but stays around

Question 18

what did Democtritus discover?

Answer 18

everything is made up of small particles

Question 19

what did Aristotle discover?

Answer 19

matter was fundamentally constructed out of atoms

Question 20

what did Dalton discover?

Answer 20

common substances always broke down into the same element

Question 21

what did JJ Thomson discover?

Answer 21

the electron

Question 22

what did Rutherford discover

Answer 22

some particles go through and some bounce back

Question 23

what did Bohr discover?

Answer 23

electrons orbit the nucleus at fixed energies and distances

Question 24

what did Heisenberg discover?

Answer 24

it is impossible to determine the exact position and speed of electrons

Question 25

why is the number called a "mass" number?

Answer 25

because it is the average mass of multiple of an element

Question 26

which corner of the isotope symbol contains the mass number

Answer 26

top left

Question 27

where is the atomic number located in the isotope symbol?

Answer 27

bottom left

Question 28

what are the wavelengths?

Answer 28

radio waves, microwaves, infrared, ultraviolet, x-rays, gamma rays

Question 29

what is the longest wavelength?

Answer 29

radio

Question 30

what is the shortest wavelength

Answer 30

gamma rays

Question 31

what wavelength has the highest energy?

Answer 31

gamma rays

Question 32

what wavelength has the lowest energy

Answer 32

radio waves

Question 33

what wavelength has the highest frequency?

Answer 33

violet

Question 34

what happens when the inside of an atom is heated?

Answer 34

makes the atoms and molecules move faster

Question 35

what are valance electrons

Answer 35

in the outermost energy

Question 36

what are core electrons

Answer 36

everything below