Ch3: Atomic structure

Question 1

How many sub-atomic particles found inside atoms?

Answer 1

3. protons, neutrons, electrons.

Question 2

Charge of neutron

Answer 2

0/neutral

Question 3

Charge of proton

Answer 3

Positive / +1

Question 4

Charge of electron

Answer 4

-1 / negative

Question 5

What are found in the centre of the atom?

Answer 5

Protons and neutrons in the nucleus

Question 6

relative mass of electron

Answer 6

Negligible mass

Question 7

Relative mass of neutron

Answer 7

1

Question 8

Relative mass of proton

Answer 8

1

Question 9

The electrons move …. around the nucleus

Answer 9

Rapidly

Question 10

How to find number of electrons with atomic number

Answer 10

Same as atomic number/proton number

Question 11

What is the nucleon number

Answer 11

Mass number of an element – total number of protons and neutrons in its nucleus

Question 12

Why is an atom always electrically neutral

Answer 12

Number of protons = number of electrons thus charges cancel out

Question 13

What is an ion?
1. The charge
2. Form when…

Answer 13

An atom or group of atoms with positive or negative charge, and forms when atoms lose or gain electrons to obtain a fully-filled outer shell.

Question 14

Metal atoms…. from their outermost shell when they form ions

Answer 14

Lose electrons

Question 15

The ions formed are positive, with _____ protons than electrons

Answer 15

More

Question 16

Non-metal atoms ____ electrons when they form ions

Answer 16

gain

Question 17

When mon-metal atoms gain electrons, they are _____ because…

Answer 17

Negative because they have more electrons than protons

Question 18

Isotopes are atoms of ______ with the same number of _____ and _____, but different number of ______.

Answer 18

Same element, protons and electrons, neutrons

Question 19

Isotopes of an element have:
Same/different atomic number
Same/different nucleon numbers

Answer 19

Same, different

Question 20

Isotopes have identical _____ properities

Answer 20

Chemical

Question 21

Isotopes are differing in melting and boiling points, solubility, density, etc. -> _____ properties

Answer 21

Physical

Question 22

Isotopes have different physical properties because of their different _____

Answer 22

Masses

Question 23

The _____ -charged electrons move around the nucleus in electron shells

Answer 23

Negatively

Question 24

Elements with _____ of valence electrons belong to the ______ group in the periodic table.

Answer 24

Same, same

Question 25

Elements in the same group have what kind of chemical properties?

Answer 25

Similar

Question 26

Exceptions in periodic table:
E.g. no. Of shells linked to period number

Answer 26

Helium 2 valence, but grp 18

Question 27

Formula for relative atomic mass

Answer 27

Percentage abundance * isotopic mass

Question 28

Noble gases are:

Answer 28

Noble gases are all odorless, colorless nonmetals. All of the noble gases have full shells of valence electrons. –> unreactive

Question 29

When separate beams of electrons, neutrons, or protons are passed through an electric field in an apparatus, they behave differently. which of the 3 will be deflected most by the field?

Answer 29

Electrons, as they are the lightest particles as compared to protons or neutrons. They would be deflected towards the positive terminal, as opposite charges attract/like charges repel