The periodic table and metals and NM

Question 1

What is an atom, element

Answer 1

1. Atom is the smallest part of an element
2. Appears substance consisting of only one atom

Question 2

What is the atomic number

Answer 2

Number of protons

Question 3

What is the mass number

Answer 3

Number of protons and neutrons

Question 4

What is group 1

Answer 4

Alkali metals

Question 5

What is group 2

Answer 5

Alkaline earth metals

Question 6

What is group 7

Answer 6

Halogens

Question 7

What is group 8

Answer 7

Noble gases

Question 8

What is a physical property

Answer 8

A substance that can be observed or measured without changing the identity of the substances

Question 9

What is a chemical property

Answer 9

A substance that can be observed in a chemical reaction

Question 10

Elelement in group 1

Answer 10

Sodium , hydrogen , lithium

Question 11

Elements group 2

Answer 11

Berilium , magnesium, calcium

Question 12

Elements group 8

Answer 12

Helium , neon, Argon

Question 13

Elements group 7

Answer 13

Fluorine , chlorine

Question 14

What is a conductor

Answer 14

Substances which allow electricity and heat to pass through them

Question 15

What is an insulator

Answer 15

Substances which do not let the electricity and heat pass through them

Question 16

What is an alloy

Answer 16

An alloy is a mixture of two or more metals

Question 17

How is rust formed

Answer 17

The metal iron reacts with oxygen in presence of water to form iron oxide

Question 18

Why is rusting bad

Answer 18

The metal can become weaker and may be unsafe to use