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WorksheetsDo you really know about us? [Group 18 and Group 1]
Total questions: 10
Worksheet time: 8mins
We are the elements in Group 18.
Can you guess who are we?
Lithium
Helium
Argon
Hydrogen
Xenon
Group 18 also known as
(a)
Group 18 elements are chemically unreactive.
Which statements will explain about this ?
there will be more than 1 answer
Helium atom already achieve stable octet electron arrangement
Neon atom already achieve stable octet electron arrangement
Neon atom already achieve stable duplet electron arrangement
Group 18 elements have already achieve stable duplet and octet electron arrangement
Helium atom already achieve stable duplet electron arrangement
Group 18 : "Which statements describe our physical properties as we going down the Group?"
Density increase
Atomic size become bigger
melting and boiling point increase
Reactivity increas
Group 18:As we going down the group, our melting and boiling point increases.
Can you explain why?
Atomic size become bigger
Van Der Waals forces between atoms become stronger
Reactivity increase
Less heat energy needed to overcome the forces between the atoms
My symbol is K.
Who am I?
(a)
We are the elements in Group 1.
Can you identify us?
Helium
Potassium
Lithium
Rubidium
Caesium
Sodium and Lithium: " We are located in the same group. Can you explain why?"
Both atoms already achieve stable octet electron arrangement
Both atoms have 1 occupied shell with electrons
Both atoms have 1 valence electrons
Both atoms have 1 electron in the outermost occupied shell
Both atoms have same physical properties
Group 1: " We can react with water. Which observations are correct to describe our reaction with water?'
[You can choose more than 1 answer]
Produce hiss sound
Move randomly with different speed based on the reactivity of the metals towards water
Produce hydrogen gas and alkaline solution
Float on water during the reaction
The reactivity increase from Li, Na, K, Rb, Cs, Fr
Potassium is more reactive than Lithium.
Do you know why?
[Choose ALL the correct statement to describe this situation]
Potassium atom is bigger than lithium atom
More easy for Potassium atom to donate/ release its valence electron
Force of attraction between nucleus and valence electron in potassium atom is more stronger than lithium atom
Potassium atom have low melting and boiling point than Li atom
Potassium atom more denser than Li atom
