10QT - term 1 - revision

Which one is negatively charged particle?

• electron

• proton

• neutron

• nucleus

An atom has 8 neutrons and mass number of 16. What is X?

• hydrogen

• oxygen

• sulfur

• helium

Which principle states that: An orbital can contain a maximum of two electrons with different orientation (spin)?

• Hund's rule

• Pauli exclusion principle

• aufbau principle

Which principle states that “Electrons occupy orbital with lowest energy first” ?

• Hund's rule

• Pauli exclusion principle

• aufbau principle

Which principle states that: In a subshell, electrons are allocated to maximize the number of lone electrons (singly occupied) and they are the same orientation (spin)?

• Hund's rule

• Pauli exclusion principle

• aufbau principle

The maximum number of electrons in subshell d is

• 4

• 6

• 8

• 10

What are elements in mixture?

• Copper and magnesium

• Magnesium and lithium

• Lithium and copper

• Magnesium and aluminum

• Magnesium and copper

What is the atomic mass of oxygen?

Round to the nearest hundredth

Answer explanation

What is the atomic mass of chlorine?

Round to the nearest hundredth

Answer explanation