Science 9 Unit B 2.3

Question 1

What is the symbol for Argon?

Accepted Answer

Ar

Question 2

Group one elements,besides hydrogen,are called ____ and they react when exposed to air or water

Accepted Answer

Alkali metals

Question 3

Group 18 elements are called ____________, which are the most stable and unreactive elements.

Accepted Answer

Noble gases

Question 4

The ______ shows how many protons are in the nucleus of one atom of the element.

Accepted Answer

Atomic number

Question 5

If Nickel has 28 protons, how many electrons does it have?

Accepted Answer

28

Question 6

Where did the word chemistry come from?

Accepted Answer

Alchemy

Question 7

__________are horizontal rows on the periodic table. (numbered one to seven)

Accepted Answer

Periods

Question 8

The _______tells you the total mass of all the protons and neutrons in an atom.

Accepted Answer

Atomic mass

Question 9

How many Protons does Ni have?

Accepted Answer

58

Question 10

What has both metallic and non-metallic properties?

Accepted Answer

Metalloids

Question 11

What is the symbol for Gold?

Accepted Answer

Au

Question 12

What is the atomic mass number for Rhodium?

Accepted Answer

102

Question 13

What element is found in group 2, period 3?

Accepted Answer

Magnesium

Question 14

Whose model of the atom is compared to a raisin muffin?

Accepted Answer

JJ Thompson

Question 15

Which of the following are in the nucleus of an atom?

Accepted Answer

protons and neutrons

Question 16

What statement about non-metals is NOT true?

Accepted Answer

They are malleable and ductile

Question 17

The __________ tells you the number of protons and neutrons in an atom.

Accepted Answer

mass number

Question 18

If Bromine's atomic number is 35 and atomic mass is 79, how man neutrons does it contain?

Accepted Answer

44

Question 19

Positively charged centre of an atom; contains protons and neutrons are called the _____.

Accepted Answer

Nucleus

Question 20

A vertical column on the periodic table forms a ____ of elements.

Accepted Answer

family, group

Question 21

True or False. Gold and copper were the first forms of matter investigated by humans.

Accepted Answer

True

Question 22

Positively charged particle in the nucleus of an atom are called_______.

Accepted Answer

Protons

Question 23

True or False. Neutrons are the neutral particle in the nucleus of an atom.

Accepted Answer

True

Question 24

What are Invisible negatively charged particle that orbits the nucleus of an atom called?

Accepted Answer

electrons

Question 25

True or false. Metals are shiny, malleable, ductile, and conduct electricity.

Accepted Answer

True

Question 26

What are the elements in group 17 called?

Accepted Answer

Halogens

Science 9 Unit B 2.3

Questions 26

Science 9 Unit B 2.3

Questions 26