Chapter 2.1

Question 1

A pure substance that cannot be further broken down by the methods of chemistry is

Answer 1

Element

Question 2

Atoms consist of………., ………….. and ………….

Answer 2

Protons
Electrons
Neutrons

Question 3

The nucleus is made up of positively charged particles called ……….. and neutral particles called………

Answer 3

Protons
Neutrons

Question 4

The protons and neutrons determine the……..

Answer 4

Mass number

Question 5

What are isotopes

Answer 5

Atoms of the same element that have different number of neutrons

Question 6

Electrically charged atoms are called

Answer 6

Ions

Question 7

Electrons occupy regions of space called

Answer 7

Orbitals

Question 8

The maximum number of electrons in any orbital is

Answer 8

Two

Question 9

Electrons in orbitals close to the nucleus have higher or lesser energy than those in orbitals further away?

Answer 9

Lesser

Question 10

In the periodic table, elements in the same row have

Answer 10

The same number of shells

Question 11

Members of a group have the same…..

Answer 11

Number of electrons in the outermost shell