Chemistry - Study Mode

[#91] How many electrons are there in a Hydrogen atom?
Correct Answer

(A) One

Explanation

Solution: There are 1 one electron in a hydrogen atom.

[#92] The third shell of an atom can have a maximum of ______ electrons.
Correct Answer

(C) 18

Explanation

Solution: The third shell of an atom can have a maximum of 18 electrons.

[#93] Who developed the model of atomic structure ?
Correct Answer

(A) Bohr and Rutherford

Explanation

Solution: Bohr and Rutherford developed the model of atomic structure.

[#94] Which among the following is a covalent compound ?
Correct Answer

(D) Carbon tetrachloride

Explanation

Solution: Ionic compounds are made up of a metal and nonmetal, and covalent compounds are made up of two nonmetals. In the carbon tetrachloride molecule, four chlorine atoms are positioned symmetrically as corners in a tetrahedral configuration joined to a central carbon atom by single covalent bonds.

[#95] Atomic number of an atom gives the number of which of the following ?
Correct Answer

(B) Protons

Explanation

Solution: Atomic number of a chemical element is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. It determines the place of an element in the periodic table. In an uncharged atom, the atomic number is also equal to the number of electrons.