Grade 8 Unit 3 Atomic Structure and Periodic Table

Question 1

The atomic mass unit (amu) of an atom with 6 protons, 6 neutrons, and 6 electrons would be ___.

Accepted Answer

12

Question 2

Who is this?

Accepted Answer

Linkin Park

Question 3

The number of ___________ determines the reactivity of the element.

Accepted Answer

valence electrons

Question 4

How do you know if elements are in the same group on the periodic table?

Accepted Answer

They have the same number of valence electrons

Question 5

What increases as you move from left to right along a period within the periodic table?

Accepted Answer

the atomic number

Question 6

The horizontal rows within the periodic table are called ________________________.

Accepted Answer

periods

Question 7

What group of elements is found to the right of the stair step line?

Accepted Answer

Nonmetals

Question 8

Who created the first periodic table?

Accepted Answer

Demitri Mendeleev

Question 9

Which of these four elements is least reactive?

Accepted Answer

Neon

Question 10

What happens to the reactivity of metals as you move from left to right on the periodic table?

Accepted Answer

reactivity decreases

Question 11

What determines an element's chemical properties?

Accepted Answer

# of valence electrons

Question 12

What is the name of the particles that are blinking in the image?

Accepted Answer

valence electrons

Question 13

___________ have a mass of 1 amu

Accepted Answer

Protons and Neutrons

Question 14

What did the scientist say when he found two helium atoms?

Accepted Answer

HeHe

Question 15

When is the best time to hear chemistry jokes?

Accepted Answer

periodically

Question 16

A characteristic of the elements shaded green on the periodic table is ______________________

Accepted Answer

good conductors

Question 17

A characteristic of non-metals is they are ____________________________.

Accepted Answer

good insulators

Question 18

Which subatomic structure has the least mass?

Accepted Answer

Electron

Question 19

The columns within a periodic table are called ________________.

Accepted Answer

groups

Question 20

Which subatomic particle(s) have a positive (+) charge?

Accepted Answer

protons

Question 21

Who is this?

Accepted Answer

Ludacris

Question 22

Which of these four elements is most reactive?

Accepted Answer

Potassium

Question 23

What can you predict about an element based on where it is on the periodic table?

Accepted Answer

physical and chemical properties

Question 24

An atom has 45 protons, 45 electrons and a mass of 145. How many neutrons does it have?

Accepted Answer

100

Question 25

Valence electrons are found in the __________________ of atoms.

Accepted Answer

outer energy shell

Question 26

Who is this?

Accepted Answer

Paramore

Question 27

What do you do with a dead chemist?

Accepted Answer

barium

Question 28

Which statement best describes this element?

Accepted Answer

The element is Lithium and it is highly reactive.

Question 29

Elements in the same group have the same number of ________________.

Accepted Answer

valence electrons

Question 30

Group __ and Group __ are most reactive

Accepted Answer

1, 17

Question 31

How many electrons does an atom of Silicon contain?

Accepted Answer

14

Question 32

Who is this?

Accepted Answer

New Kids on the Block

Question 33

Who is this?

Accepted Answer

50 cent

Question 34

Inside the nucleus of an atom are ________________________.

Accepted Answer

Protons and Neutrons

Question 35

What reacts like Argon but has a smaller mass?

Accepted Answer

Neon

Question 36

Using a periodic table, Calcium has similar chemical properties to which element?

Accepted Answer

Beryllium

Question 37

What group of elements is shiny, malleable, ductile and good conductors of electricity?

Accepted Answer

Metals

Question 38

How many neutrons are in an atom of Chlorine?

Accepted Answer

18

Question 39

The Periodic Table organizes what?

Accepted Answer

Elements

Question 40

Which group of elements is highlighted?

Accepted Answer

Metalloids

Question 41

Elements that are in the same period have the same number of ________________.

Accepted Answer

energy shells

Question 42

Elements with _____ valence electron(s) and _____ valence electron(s) are the most reactive.

Accepted Answer

1, 7

Question 43

____________ always identify the element.

Accepted Answer

protons

Question 44

What subatomic particles are found in the nucleus of atoms?

Accepted Answer

protons and neutrons

Question 45

A physical characteristic of metals is that they are __________________________.

Accepted Answer

malleable

Question 46

How many electrons are in an atom of Oxygen?

Accepted Answer

8

Question 47

What is the charge of the nucleus of an atom that has 9 protons, 10 neutrons, and 9 electrons?

Accepted Answer

+9

Grade 8 Unit 3 Atomic Structure and Periodic Table

Questions 47

Grade 8 Unit 3 Atomic Structure and Periodic Table

Questions 47