Tag: introduction to non-metals

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Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Which statement is false?

  1. Elements of VB group are transition elements

  2. Elements of VA group are all metalloids

  3. Elements of IA and IIA groups are metals

  4. Elements of IVA group are neither strongly electronegative nor strongly electropositive
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In element of $VA$ only arsenic and antimony are metalloids where as nitrogen and phosphorus are non metal. Bismuth and moscovium are metal.

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Which of the following is the most reactive metal?

  1. Copper

  2. Gold

  3. Silver

  4. Francium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Francium, right on the bottom of the group one of periodic table. As we know,size of the atoms increases as you go down a column and decreases as you go across the table. The larger the atom, the easier is to get rid of the valence electrons and easier to react with other atoms. Now if you look at the periodic table, francium has the largest radius therefore it is the most reactive element.

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Nitrogen and germanium are:

  1. metal and non-metal respectively

  2. metal and metalloid respectively

  3. non-metal and metalloid respectively

  4. non-metal and metal respectively
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydrogen, oxygen, nitrogen etc. are non-metal and boron, silicon, germanium etc. are metalloids. On the basis of chemical and physical properties, elements are further classified into metals, non metals and metalloids.

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Mark the correct statement.

  1. Some metals are found in earth's crust in the free state

  2. Metals at the bottom of activity series are least reactive

  3. Gold, silver can never be found in free state

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Some metals are found in earth's crust in the free state. Some are found in the form of their compounds. The metals at the bottom of activity series are least reactive.

Multiple choice chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

Metals found at the top of the reactivity series are never found in free-state because

  1. They are less reactive

  2. They are highly reactive

  3. They are moderately reactive

  4. None of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Metals found at the top of the reactivity series are never found in free-state as they are very reactive, e.g. K, Na, Ca, Mg and Al, etc.