1.1 Atoms

Question 1

What is an element?

Answer 1

Relatively small number of substances are made up of only one type of atom. This substances are called elements.

Question 2

What is an atom?

Answer 2

Smallest particle of a chemical element that can exist.

Question 3

All substances are made of tiny particles called what..?

Answer 3

Atoms

Question 4

How much variety of atoms are there?

Answer 4

100 different types of atom found naturally on Earth.

Question 5

What happens when the atoms combine?

Answer 5

It gives huge variety of ways , giving all those different substances,

Question 6

How much variety of elements are there?

Answer 6

100 different types of elements naturally found.

Question 7

Do elements have different properties?

Answer 7

Yes

Question 8

What elements are shiny , solid metals?

Answer 8

• Silver
• Chromium
• Copper
• Gold

Question 9

What elements are non-metals and gases at room temperature?

Answer 9

• Oxygen
• Nitrogen
• Argon
• Chlorine

Question 10

What is the definition of chemical symbols?

Answer 10

It is the name used for an element depends on the language being spoken.

Question 11

What is an example of chemical symbols in different languages?

Answer 11

Element sulfur is called schwefel in German and azufre in Spanish.

Question 12

How do scientists publish their findings from different countries?

Answer 12

Forms a global community and scientists from many nations communicate each other and publish their findings.

Question 13

Where are the alkali metals in the periodic table?

Answer 13

All of group 1

Question 14

Where are the alkaline earth metals in the periodic table?

Answer 14

All of group 2

Question 15

Where is the transition metals located?

Answer 15

Centre of the periodic table

Question 16

Where are the noble gases in the periodic table?

Answer 16

All of group 0

Question 17

Where are the halogens in the periodic table?

Answer 17

All of group 7

Question 18

Where are the lanthanides located?

Answer 18

On the first line from the end of the periodic table

Question 19

Where are the actindes located?

Answer 19

Second line from the end of the periodic table

Question 20

What does the symbols in the periodic table represent?

Answer 20

Represents the atoms

Question 21

What is the meaning of groups in the periodic table?

Answer 21

The elements are arranged in columns called groups.

Each group will contains elements with similar chemical properties,

Question 22

What does the ‘staircase’ drawn on the right of the periodic table mean?

Answer 22

It splits between metals and non-metals.

Left : Line of metals
Right: Non-metals

Question 23

What are the few elements called that are lying next to the dividing line?

Answer 23

Metalloids or semi metals.

Question 24

Why are they called metalloids/semi-metals?

Answer 24

They have some metallic and some non-metallic properties

Question 25

What are the example of metalloids/semi metals?

Answer 25

• Silicon

- Germanium

Question 26

What is the definition of a compound?

Answer 26

Made up of different atom bonded together.

Question 27

What is a definition of a molecule?

Answer 27

A grouping of two or more atoms bonded together.

Question 28

Explain water molecule structure?

Answer 28

It’s chemical bonds that holds the hydrogen and oxygen atoms together in the water molecule.

Question 29

What are atoms made up of?

Answer 29

Central nucleus and electrons orbiting around it.