Question

1)One of these Noble Gases is not like the others. (valence e-) Ne Xe Ar He K

2)

How many “Noble Gas core” electrons (non-valence) does a neutral aluminum atom possess?

13

10

8

3

27

3)

Which of the following elements has the greatest attraction for electrons?

N

C

O

B

4)

Which of the following atoms tend to not obey the Octet Rule? There might be more than one.

H

C

Ba

B

P

5)

A polar molecule is also referred to as a ?

tetrahedron

dipole

cation

magnet

orbital

6)

In covalent bonding: the greater the number of electron pairs shared, the weaker the bond.

True

False

Answer 1

Q.1) K

It is a alkali metal.

Q.2) 3

Aluminium has 3 valence electrons. Valence electrons are located in the outermost shell of an element.

Q.3) O

Electronegativity increases from bottom to top in groups, and increases from left to right across periods.

Q.4) H

However, many atoms below atomic number 20 often form compounds that do not follow the octet rule. This leads to hydrogen and lithium both having two electrons in their valence shell—the same electronic configuration as helium—when they form molecules by bonding to other elements.

Q.5) dipole.

A polar molecule is a molecule in which one end of the molecule is slightly positive, while the other end is slightly negative. A dipole is any molecule with a positive end and a negative end, resulting from unequal distribution of electron density throughout the molecule.

Q.6) False.

Double bonds are stronger than single bonds, and triple bonds are stronger than double bonds - but the types of bonds in each one are stronger in the single bond. Covalent bonds are formed by orbitals of electrons merging between two atoms.