structure of the atom

Question 1

what is the chemical identity of an atom?

Answer 1

the number of protons

Question 2

what is the atom?

Answer 2

smallest unit that can be divided without electrical charged particles releasing

Question 3

what is the charge of the nucleus?

Answer 3

positve charge

Question 4

what makes up the atomic mass?

Answer 4

nucleus (protons + neutrons)

Question 5

protons =

Answer 5

atomic number and electrons

Question 6

the number of neutrons =

Answer 6

atomic mass - # of protons

Question 7

where are electrons found?

Answer 7

in clouds/orbits around the nucleus

Question 8

what is it called when the number of neutrons change in the nucleus?

Answer 8

isotopes

Question 9

what makes up the atom’s volume?

Answer 9

electron cloud

Question 10

what are the outermost electrons called and what are they used for?

Answer 10

valence electrons used for chemical bonding

Question 11

the bigger the atom, ________________, the more ________________

Answer 11

the bigger the atom, the bigger the nucleus, the more orbits/levels for electrons

Question 12

what does the unit of measurement amu stand for?

Answer 12

atomic mass units

Question 13

which 2 subatomic particles have a mass of 1?

Answer 13

protons & neutrons

Question 14

what is the relative mass of electrons?

Answer 14

1/1890

Question 15

what is the electrical charge for protons, neutrons, electrons?

Answer 15

protons: +1 amu
neutrons: 0 amu
electrons: -1 amu

Question 16

to find the # of electrons, if element has no charge ________

Answer 16

then # of electrons = # of protons

Question 17

to find the # of electrons, if element has a positive charge _____

Answer 17

then # of electrons = # of protons - charge

Question 18

to find the # electrons, if element has a negative charge _____

Answer 18

then # of electrons = # of protons + charge

Question 19

how can atoms become charged?

Answer 19

when they lose or gain electrons from the valence electrons

Question 20

what happens when atoms gains electrons and what is it called?

Answer 20

becomes negatively charged and called anions

Question 21

what happens when atoms lose electrons and what is it called?

Answer 21

becomes positively charged and called cation

Question 22

do all elements of the same kind have the same # of neutrons?

Answer 22

no

Question 23

what is it called when elements have different # of neutrons?

Answer 23

isotopes

Question 24

what is the definition of isotopes?

Answer 24

atoms of the same element with different mass numbers

Question 25

atomic number = what 2 things

Answer 25

= protons = electrons

Question 26

mass # =

Answer 26

protons + neutrons