Atomic Valency

Q.

What is the valency of N in $\mathrm{NO},{\mathrm{N}}_2\mathrm{O}$ and ${\mathrm{NO}}_2$?

Q.

Why is oxygen written as ${\mathrm{O}}_2$?

Q.

How do you find the coordination number of sodium chloride $\left(\mathrm{NaCl}\right)$?

Q.

Write the formula and valency of aluminate.

Q. The valency of oxygen is .

1. 1
2. 3
3. 2
4. 6

Q.

What is the Valency of Bromine?

Q.

How many electrons does a Hydrogen atom have?

Q.

Faster and smarter way to learn valency of elements and radical

Q.

The five successive ionization enthalpies of an element are$800,2427,3658,25024,\mathrm{and}32824\mathrm{kJ}{\mathrm{mol}}^{-1}$. The number of valence electrons in the element is:

1. $2$

2. $4$

3. $3$

4. $5$

Q.

How many valence electrons are in an atom of Magnesium?

Q.

How many valence electrons does Boron have?

1. 2

2. 3

3. 3

4. 3

Q.

What is the valency of sulphur in ${\mathrm{H}}_2\mathrm{S}$

Q.

Multiple choice question : (answer with reason)

Silver , gold and platinum are called noble metals because

A) these are costly

B) these are precious

C ) these have very less reactivity

D) all of these

Q.

The valency of an element depends on which of the following factors?

1. The atomic number of the element

2. The number of electrons in the valence shell

3. The atomic mass of the element

4. The number of protons in the nucleus.

Q.

What is the valency of fluoride?

Q. What is the difference between valency and radical?

Q. How to find the valency of radicles

Q.

How many valence electrons are in alkali metals?

Q. What is a radical? What is the difference between a cation and an ion?

Q. What is a radical?

Q.

Write the molecular formulae for the compound: Copper (II) Bromide

Q. What is radical?

Q.

For a Sodium atom, the Valence electron lies in the ___shell/energy level.

Q.

Write the valency of the following elements: Potassium, Oxygen, Aluminium and silicon

Q.

When one atom of Sodium combines with one atom of Chlorine, a molecule of Sodium chloride is formed.

1. True
2. False

Q.

Write the molecular formula of sodium chloride.

Q. So the valency of OH in CH³COOH is 2 because C has two bonds with O and 1 bond with OH

Q.

what is variable valency ?

Q. Why do Helium, Neon and Argon have zero valency?

Q.

An element X has a mass number 4 and an atomic number 2. Write the valency of this element?