Chemistry~ Elements and Compounds

Question 1

What is an element?

Answer 1

An element only contains one type of atom and can be found on the periodic table.

Question 2

What is a compound?

Answer 2

A compound is a substance containing at least two different elements that are
chemically bonded together.

Question 3

What is a mixture?

Answer 3

A mixture contains at least two different
substances (elements and/or compounds)
that are not chemically bonded together.

Question 4

What is an atom?

Answer 4

The simplest things in the universe found in elements.

Question 5

Label the neutrons, protons and electrons of an atom (on canvas)

Answer 5

Answer on canvas.

Question 6

What is matter?

Answer 6

The general scientific term, describing the ‘stuff’ that makes up everything around us.

Question 7

What are molecules?

Answer 7

Made up of two or more atoms of the same element.

Question 8

What are compounds?

Answer 8

Substance made up of two or more different atoms that are chemically joined together.

Question 9

Protons have…?

Answer 9

Positive charge.

Question 10

Electrons have…?

Answer 10

Negative charge.

Question 11

Neutrons have…?

Answer 11

No charge.

Question 12

The larger number of an element is the…?

Answer 12

The larger number is the atomic mass – this
tells us how many protons and neutrons are in
the nucleus.

Question 13

The smaller number is the…?

Answer 13

Atomic number – this
tells us how many protons are in the nucleus (and
how many electrons are orbiting).

Question 14

Use canva for examples of finding p|P~ E~N

Answer 14

On canva.

Question 15

What is the formula for density?

Answer 15

Mass divided by volume.
M/V ~ g/cm 3

Question 16

Fill the blanks: An irregularly shaped object was balanced to find it’s mass in ____.
A _________ can was filled to the spout with water, the object lowered into the can, displacing some of the water, which flowed through the_______ into a __________ .

Answer 16

Grams……. Eureka…….spout………beaker.

Question 17

The number of protons is the…?

Answer 17

Atomic number.

Question 18

An atom contains the same number of…?

Answer 18

Protons and electrons but with different charge.

Question 19

The opposite of melting is…?

Answer 19

Freezing.

Question 20

The opposite of boiling is…?

Answer 20

Condensation.

Question 21

The opposite of sublimation is…?

Answer 21

Deposition.

Question 22

What is sublimation and deposition?

Answer 22

Sublimation is changing state from solid to gas and deposition is gas to solid.

Question 23

What is a controlled variable?

Answer 23

The one that stays the same.

Question 23

What is a dependent variable?

Answer 23

The one you measure.

Question 24

What is an independent variable?

Answer 24

The one that changes.

Question 25

The current version of the periodic table was developed by who in what year?

Answer 25

Mendeleev in 1869

Question 26

How many elements are there and how are they ordered?

Answer 26

118 and are ordered according to increasing atomic number.

Question 26

What is 'Brownian motion' and how can it be observed?

Answer 26

When particles bounce of each other in solids and liquids. Can be observed by spraying aerosols.

Question 26

What is diffusion?

Answer 26

Movement of fluid from where it is highly concentrated to less concentrated.

Question 27

How does temperature affect particle movement.

Answer 27

Higher temperatures cause particles to vibrate more meaning they move faster and can diffuse faster.

Question 28

Why does a balloon stay inflated when you tie of pinch it?

Answer 28

when pressure is applied to the particles the air is kept inside.

Question 29

Why do balloons whoosh around when untied?

Answer 29

Because high pressure builds up inside it and when released into a low pressure environment,.

Question 30

What is density?

Answer 30

The density of a substance may be described as ‘how heavy it is for its size’.