CHEM

Question 2

What is the atomic number of Carbon?

Answer 2

6

Question 3

True or False: The Periodic Table is organized by increasing atomic mass.

Answer 3

False

Question 4

Fill in the blank: The element with the symbol ‘Na’ is called ______.

Answer 4

Sodium

Question 5

Which group of the Periodic Table contains the noble gases?

Answer 5

Group 18

Question 6

What is the chemical symbol for Gold?

Answer 6

Au

Question 7

True or False: All elements in the same group have similar chemical properties.

Answer 7

True

Question 8

What does the term ‘period’ refer to in the Periodic Table?

Answer 8

A horizontal row of elements.

Question 9

What is the most abundant element in the universe?

Answer 9

Hydrogen

Question 10

Which element has the highest atomic number currently known?

Answer 10

Oganesson (Og)

Question 11

Fill in the blank: The elements in Group 1 are known as ______ metals.

Answer 11

Alkali

Question 12

What is the main characteristic of transition metals?

Answer 12

They can form variable oxidation states.

Question 13

Which element is represented by the symbol ‘Fe’?

Answer 13

Iron

Question 14

What is the periodic law?

Answer 14

The properties of elements are periodic functions of their atomic numbers.

Question 15

Which two elements are liquid at room temperature?

Answer 15

Mercury and Bromine

Question 16

True or False: Helium is a reactive gas.

Answer 16

False

Question 17

What is the difference between an element and a compound?

Answer 17

An element is a pure substance made of one type of atom; a compound is made of two or more different types of atoms chemically bonded.

Question 18

What is the main characteristic of metalloids?

Answer 18

They have properties of both metals and nonmetals.

Question 19

Which group contains the alkali earth metals?

Answer 19

Group 2

Question 20

What is the chemical symbol for Silver?

Answer 20

Ag

Question 21

Fill in the blank: The first element in the Periodic Table is ______.

Answer 21

Hydrogen

Question 22

How many periods are there in the modern Periodic Table?

Answer 22

7

Question 23

What type of bond is formed between two nonmetals?

Answer 23

Covalent bond

Question 24

True or False: Nonmetals are good conductors of electricity.

Answer 24

False

Question 25

Which element is a gas at room temperature and has the atomic number 7?

Answer 25

Nitrogen

Question 26

What is the primary use of the element Silicon?

Answer 26

Semiconductors in electronics.

Question 27

Which element is represented by the symbol 'K'?

Answer 27

Potassium

Question 28

Fill in the blank: The most reactive group of nonmetals is the ______.

Answer 28

Halogens

Question 29

What is ionisation energy?

Answer 29

The energy required to remove an electron from an atom or ion in its gaseous state.

Question 30

True or False: Ionisation energy increases across a period in the periodic table.

Answer 30

True

Question 31

What trend in ionisation energy is observed down a group in the periodic table?

Answer 31

Ionisation energy decreases.

Question 32

Which element has the highest ionisation energy in the periodic table?

Answer 32

Helium

Question 33

Fill in the blank: The first ionisation energy is the energy required to remove the _____ electron from a neutral atom.

Answer 33

first

Question 34

What is the general trend of ionisation energy as atomic number increases within a group?

Answer 34

It generally decreases.

Question 35

Multiple Choice: Which of the following elements has the lowest first ionisation energy? A) Lithium B) Barium C) Neon D) Fluorine

Answer 35

B) Barium

Question 36

What is the second ionisation energy?

Answer 36

The energy required to remove a second electron from a singly charged ion.

Question 37

True or False: Ionisation energy is always a positive value.

Answer 37

True

Question 38

Which factors influence ionisation energy?

Answer 38

Nuclear charge, electron shielding, and atomic radius.

Question 39

Fill in the blank: Ionisation energy is typically measured in _____ per mole.

Answer 39

kilojoules

Question 40

What is meant by 'successive ionisation energies'?

Answer 40

The energies required to remove each electron in turn from an atom or ion.

Question 41

Multiple Choice: Which of the following elements would you expect to have a higher ionisation energy? A) Sodium B) Chlorine

Answer 41

B) Chlorine

Question 42

What happens to the ionisation energy of an atom as it becomes positively charged?

Answer 42

The ionisation energy increases.

Question 43

True or False: The first ionisation energy is typically lower than the second ionisation energy.

Answer 43

True

Question 44

What is the relationship between ionisation energy and the reactivity of metals?

Answer 44

Lower ionisation energy typically indicates higher reactivity.

Question 45

Fill in the blank: The trend of ionisation energy can be explained by _____ theory.

Answer 45

atomic structure

Question 46

Multiple Choice: Which of the following has the highest second ionisation energy? A) Magnesium B) Sodium C) Potassium D) Calcium

Answer 46

A) Magnesium

Question 47

What is the significance of a large jump in successive ionisation energies?

Answer 47

It indicates a change in the electron shell or a more stable electron configuration.

Question 48

True or False: Noble gases have high ionisation energies.

Answer 48

True

Question 49

What is the effect of electron shielding on ionisation energy?

Answer 49

Electron shielding reduces the effective nuclear charge felt by outer electrons, lowering ionisation energy.

Question 50

What does a high ionisation energy imply about an element's ability to lose electrons?

Answer 50

It implies that the element has a low tendency to lose electrons.

Question 51

Fill in the blank: The ionisation energy of an element can be affected by its _____ state.

Answer 51

oxidation

Question 52

Multiple Choice: Which group of elements generally has low ionisation energies? A) Alkali metals B) Noble gases C) Halogens D) Transition metals

Answer 52

A) Alkali metals

Question 53

What is the unit of measurement for ionisation energy?

Answer 53

Kilojoules per mole (kJ/mol).