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Standard VII

Chemistry

Noble Gases

Four elements...

Question

Four elements are the most abundant in life: carbon, oxygen, hydrogen, and nitrogen. What do they have in common?

They can all form double bonds with carbon.

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They are all relatively light atoms (near the top of the periodic table).

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They have the same atomic mass.

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They are all tetravalent.

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Solution

The correct option is B They are all relatively light atoms (near the top of the periodic table).
All these elements viz. carbon, oxygen, hydrogen, and nitrogen are the element with relatively light atoms. They are found near the top of the periodic table.

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Similar questions

Select the proper option and complete the statements

(single, all, double, ionic, carbon, give and take, hydrogen, multiple, share, most, covalent)

a. A carbon atom forms a ...... bond with other atoms. In this bond the two atoms ....electrons.

b. All the carbon bonds in a saturated hydrocarbon ........ electrons.

c. At least one carbon bond in an unsaturated hydrocarbon is ....

d. ..... is the essential element in all the organic compounds.

e. The element hydrogen is present in ..... organic compound.

Q. The most abundant elements by mass in the body of a healthy human adult are: Oxygen

(61.4 %)

, Carbon

(22.9 %)

, Hydrogen

(10.0 %)

and Nitrogen

(2.6 %)

. The weight which a 75 kg person would gain if all

H^{1}

atoms are replaced by

H^{2}

atoms is:

Q. The most abundant elements by mass in the body of a healthy human adult are : Oxygen

(61.4 %)

; Carbon

(22.9 %)

, Hydrogen

(10.0 %)

; and Nitrogen

(2.6 %)

. The weight which a 75 kg person would gain if all

^{1} H

atoms are replaced by

^{2} H

atoms is :

Q. The most abundant elements by mass in the body of a healthy human adult are oxygen (61.4%), carbon (22.9%), hydrogen (10.0%) and Nitrogen (2.6%). The weight which a

75 kg

person would gain if all the

^{1} H

atoms are replaced by

^{2} H

atoms is:

Oxygen has 3 isotopes of atomic mass 16,17,18 respectively. Explain why they have same chemical properties, they are all electrically neutral.

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Four elements are the most abundant in life: carbon, oxygen, hydrogen, and nitrogen. What do they have in common?

The correct option is B They are all relatively light atoms (near the top of the periodic table).All these elements viz. carbon, oxygen, hydrogen, and nitrogen are the element with relatively light atoms. They are found near the top of the periodic table.

The correct option is B They are all relatively light atoms (near the top of the periodic table).
All these elements viz. carbon, oxygen, hydrogen, and nitrogen are the element with relatively light atoms. They are found near the top of the periodic table.