RRISD: Grade 8 Unit 1 Atomic Structure and Periodic Table

Question 1

How many electrons are in an atom of Oxygen?

Accepted Answer

8

Question 2

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

Accepted Answer

+9

Question 3

Which element in period 2 is the least reactive?

Accepted Answer

Neon

Question 4

Identify the element that has more valence electrons than F and fewer energy levels than Na.

Accepted Answer

Neon

Question 5

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

Accepted Answer

12

Question 6

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

Accepted Answer

physical and chemical properties

Question 7

What do you do with a dead chemist?

Accepted Answer

barium

Question 8

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

Accepted Answer

Beryllium

Question 9

Which element is in period 3 and is more reactive than magnesium?

Accepted Answer

Sodium

Question 10

What element is represented by Nb on the periodic table?

Accepted Answer

Niobium

Question 11

The columns within a periodic table are called ________________.

Accepted Answer

groups

Question 12

What is a limitation of the Bohr model of atoms?

Accepted Answer

electrons don't orbit the nucleus like planets do the sun, scale of it does not represent the actual size of an atom

Question 13

When is the best time to hear chemistry jokes?

Accepted Answer

periodically

Question 14

What atoms make up this fish?

Accepted Answer

2Na

Question 15

Who is credited with creating the modern day periodic table?

Accepted Answer

Demitri Mendeleev

Question 16

Which of these four elements is most reactive?

Accepted Answer

Potassium

Question 17

What was the charge when NaCl was arrested?

Accepted Answer

a salt

Question 18

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

Accepted Answer

energy shells

Question 19

The number of neutrons in an atom are determined by ______________________.

Accepted Answer

mass number minus atomic number

Question 20

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

Accepted Answer

good conductors

Question 21

Identify the element with 3 energy levels and 2 valence electrons.

Accepted Answer

Magnesium

Question 22

Which letter of the alphabet never appears in the periodic table?

Accepted Answer

J, Q

Question 23

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

Accepted Answer

valence electrons

Question 24

What is this element?

Accepted Answer

Chlorine

Question 25

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

Accepted Answer

protons

Question 26

What is the average atomic mass of this atom?

Accepted Answer

35

Question 27

The horizontal rows within the periodic table are called ________________________.

Accepted Answer

periods

Question 28

Which three elements listed are the group containing the most reactive metals?

Accepted Answer

Li, Na, K

Question 29

The Noble Gas that is used to fill balloons is called?

Accepted Answer

Helium

Question 30

The Periodic Table organizes what?

Accepted Answer

Elements

Question 31

What determines an element's chemical properties?

Accepted Answer

# of valence electrons

Question 32

H2O is water and H2O2 is hydrogen peroxide. What is H2O4?

Accepted Answer

drinking, swimming

Question 33

What particles are found in the nucleus of atoms?

Accepted Answer

protons and neutrons

Question 34

A physical characteristic of metals is that they are __________________________.

Accepted Answer

malleable

Question 35

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

Accepted Answer

valence electrons

Question 36

Who is this?

Accepted Answer

Dmitri Mendeleev

Question 37

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

Accepted Answer

HeHe

Question 38

Which of these are not a real element?

Accepted Answer

Brittanium

Question 39

How many neutrons are in an atom of Chlorine?

Accepted Answer

18

Question 40

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

Accepted Answer

reactivity decreases

Question 41

Valence electrons are found in the __________________ of atoms.

Accepted Answer

outer energy shell

Question 42

Identify the metalloid in group 13.

Accepted Answer

Boron

Question 43

Which of the following are NOT found in an atom?

Accepted Answer

Elements

Question 44

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

Accepted Answer

the atomic number

Question 45

Inside the nucleus of an atom are ________________________.

Accepted Answer

Protons and Neutrons

Question 46

How many electrons does an atom of Silicon contain?

Accepted Answer

14

Question 47

How many elements on the periodic table naturally occur in nature?

Accepted Answer

94

Question 48

The "H" in H2O represents which element?

Accepted Answer

Hydrogen

Question 49

Which of these four elements is least reactive?

Accepted Answer

Neon

Question 50

A characteristic of non-metals is they are ____________________________.

Accepted Answer

good insulators

Question 51

Why are atoms neutral?

Accepted Answer

same number of protons and electrons

RRISD: Grade 8 Unit 1 Atomic Structure and Periodic Table

Questions 51

RRISD: Grade 8 Unit 1 Atomic Structure and Periodic Table

Questions 51