Chemistry

Question 0

What is an element?

Answer 0

A chemical substance that is made up of ONLY ONE TYPE OF ATOM

Question 1

What is an atom?

Answer 1

The smallest unit of matter

Question 2

Where is a proton found?

What’s its charge?

Answer 2

Nucleus

Positive (+)

Question 3

What’s a neutron found?

What’s its charge?

Answer 3

Nucleus

Neutral

Question 4

Where’s the electron found?

It’s charge?

Answer 4

Orbiting around the nucleus in different energy levels

Negative

Question 5

Where’s the atomic #?

Answer 5

12«<
Mg
24.305

Question 6

Where the chemical symbol?

Answer 6

12
Mg«<
24.305

Question 7

Where the atomic mass?

Answer 7

12
Mg
24.305«<

Question 8

How do you determine the number of protons?

Answer 8

of Protons = atomic #

Question 9

What’s the mass number (atomic mass) of an element? (Explain what makes up the mass of an atom)

Answer 9

The number of PROTONS + NEUTRONS in an atom

Question 10

How do you determine the number of neutrons?

Answer 10

Mass number - atomic # =

OR

(Protons +neutrons) - protons =

Question 11

What does it mean when an atom is electrically neutral?

Answer 11

Neutron

Question 12

What does it mean to be electrically positive?

Answer 12

Proton

Question 13

What does it mean to be electrically negative?

Answer 13

Electron

Question 14

Positive or negative?

P: 3
N: 3
E: 4

Answer 14

1-

Question 15

Pos or Neg:

P:17
N: 19
E: 16

Answer 15

1+

Question 16

Pos or Neg:

Answer 16

P: 13
N: 14
E: 12

Question 17

What does a Lewis dot structure show?

Answer 17

It shows only the valence electrons in an atom

Question 18

What’s a Bohr model?

Answer 18

Shows an atom and it’s components

Question 19

What kind of trick do you use to determine the # of valence electrons in an atom?

Answer 19

protons = # electrons

Question 20

How do atoms become ions?

Answer 20

It loses or gains one or more electrons

Question 21

Why do atoms become ions?

Answer 21

Atoms become more stable with a full valence shell of electrons (usually 8 electrons). Since these atoms are losing or gaining electrons, they give themselves a positive or negative charge as a result anSince these atoms are losing or gaining electrons, they give themselves a positive or negative charge as a result and become ions.

Question 22

Name 2 similarities between atoms and ions.

Name 2 difference between atoms and ions.

Answer 22

An ion is an atom and contains massive particles, protons and neutrons . However, ions have a specific charge, which is to say that they have different numbers of protons and electrons. An atom with no charge (neutral) has the same # of p as of e.

Question 23

What charge does an atom have if it loses electrons?

Answer 23

The atom becomes positive
Because it is losing one or more negative charges.
(Now has more protons than electrons)

Question 24

What charge does an atom have if it gains electrons?

Answer 24

The atoms become negative because it is gaining one or more negative charges. (Now has more electrons than protons)