Atomic Structure and Isotopes

Question 1

All matter is composed of atoms

Answer 1

True

Question 2

Atoms of any one element differ in properties from atoms of another element

Answer 2

True

Question 3

Atoms of an element have a characteristic average mass which is unique to that element

Answer 3

True

Question 4

Atoms cannot be subdivided, created, or destroyed in ordinary chemical reactions.
However, these changes CAN occur in nuclear reactions

Answer 4

True

Question 5

the number of protons in the nucleus of each atom of that element

Answer 5

Atomic Number

Question 6

the number of protons and neutrons in the nucleus of an isotope

Answer 6

Mass Number

Question 7

number of protons + number of neutrons

Answer 7

Mass number

Question 8

Number of protons

Answer 8

Atomic mass

Question 9

atoms of the same element having different masses due to varying numbers of neutrons

Answer 9

Isotopes

Question 10

how you determined the model element’s identity

Answer 10

By looking at the number of protons

Question 11

How do you determined the model element’s charge (ions)

Answer 11

By subtracting the elections with the protons

Question 12

Explain how you determined the model element’s isotope

Answer 12

By combining the element symbol with a mass number (P+N)

Question 13

Explain why models must be used to build our understanding of atoms

Answer 13

So that we can get visual/organized understanding of atoms

Question 14

Atomic number

Answer 14

The number of protons

Question 15

Atomic mass

Answer 15

Protons + neutrons & multiplying by 1amu

Question 16

Element symbol + (+)P unequal (-)E
(+)P - E(-)

Answer 16

Ion

Question 17

The modern periodic table is arranged by increasing atomic number of the clements

Answer 17

True

Question 18

Isotopes are forms of an element that have the same number of protons but a different number of neutrons

Answer 18

True

Question 19

An input of energy is required in order for nuclear decay to happen in an atom

Answer 19

False
(Can happen by releasing different particles)

Question 20

The stability of a nucleus is determined by the ratio of electrons to protons

Answer 20

False
(It’s by the neutrons and protons)

Question 21

The mass of a neutron is approximately equal to the mass of a proton.

Answer 21

True