Worksheetsgroup 18
Total questions: 11
Worksheet time: 5mins
What are the elements in group 18 (the far right) of the periodic table called?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
Diagram shows the symbol of neon. Which statements is not true about neon?
Neon exist as a monatomic elements
Neon has low melting and boiling point
Neon has a low density
Neon reacts with bromine to form a covalent compound
Which property of Group 18 elements increases when going down the Group in the Periodic Table?
Forces of attraction
Reactivity
Solubility in water
Electrical conductivity
The symbol for helium is
H
He
Hl
Hm
The symbol for argon is
Ar
Ag
An
A
Helium is a good insulator. Why?
Helium do not contains mobile ions
Helium do not contains mobile electrons
Helium is not inert
Helium is light
Why is Helium used in divers' tank but not hydrogen gas?
Helium is lighter than hydrogen
Helium is inert to any chemical reactions
Helium is cheaper
Helium is easy to get from market
Argon (proton number =18) is inert to any chemical reaction because
It is light
it is located in Group 18
it has achieved stable duplet electron arrangement
it has achieved stable octet electron arrangement
Dimitri Mendeleev's classification of the elements in the Periodic Table was a great improvement compared to John Newlands because
i He left gaps to be allocated for undiscovered elements
ii He predicted the properties of the undiscovered elements
iii He classified the elements into triads
iv He arranged the elements in ascending order of their proton numbers.
i and ii are correct only
i and iv are correct only
ii and iii are correct only
iii and iv are correct only
The following shows some information about element Q.
1) Relative atomic mass is 9
2) has 5 neutrons
Which statements is correct about element Q?
Element Q is placed in Group 15 of the Periodic Table
Atom Q has 9 protons
Element Q has 2 valence electrons
Atom Q has three shells occupied with electrons
Diagram above shows the electron arrangements of atom D and atom E. Which of the following statements is true about elements D and E?
The boiling point of Element E is lower than Element D
Both the elements, D and E, can conduct electricity
Both the elements, D and E, are very soluble in water
Both the elements, D and E, cannot combine with other elements to form compounds
