Electron Distribution in Orbits

Q.

What is Hunds Rule, Pauli Exclusion Principle, and the Aufbau Principle?

Q.

What is the electron configuration for ${\mathrm{Zn}}^{2+}$?

Q.

Explain the rule with example according to which electrons are filled in various energy levels.

Q.

Write the electronic configuration of potassium.

Q.

What is the structure of ${\mathrm{BF}}_4^{-}$ ?

Q.

Why are the shell values represented by KLMN and not by any other letter?

Q.

Why orbits are also called energy levels?

Q.

${\mathrm{Na}}^{+}$ has completely filled $\mathrm{K}$ and $\mathrm{L}$ shells. Explain.

Q.

Write the electronic configuration of boron.

Q.

Write the formula and names of the compounds formed between :
Ammonium and phosphate ions

Q.

The bohr's formula shows that the third shell should have 18 ELECTRONS whereas it is 2, 8, 8, 18 why is it so???

Q.

Why helium configuration is different than other noble gas but still it is a noble gas?

Q.

Identify the element that has two electrons in the 'K' shell of its atom.

1. Hydrogen

2. He⁺

3. Helium

4. Aluminium

Q.

How many electrons are present in M shell?

1. 8

2. 9

3. 18

4. 32

Q. If an atom of an element has 20 electrons in total, then what will be the outer most orbit of the atom and the number of valence electrons?

1. N, 6
2. M, 10
3. N, 2
4. M, 2

Q.

When we are talking about the $n^{th}$ shell, how many electrons can it house?

1. $3n^2$

2. $2n^3$

3. $2n^2$

4. $n^2$

Q. Which of the following element is a noble gas? (Z - Atomic number)

1. Z - 8
2. Z - 10
3. Z - 12
4. Z - 9

Q.

Find the odd one out: Chloride, Nitrate, Hydride, Ammonium

Q.

What are the names and symbols of elements having electronic configuration?

$$\begin{gathered} \mathrm{K}\mathrm{L}\mathrm{M}\mathrm{N} \\ 23 \end{gathered}$$

Q. Match the following regions with the maximum no. of electrons they can hold.

1. 8
2. 18
3. 2

Q.

Explain the rule with example according to which electrons are filled in various energy levels.

Q.

Write down the names of compounds represented by the formulae and their constituent ions: $\mathbf{\left(}{\mathbf{CaCl}}_{\mathbf{2}}\mathbf{\right)}$

Q.

Explain electronic configuration by giving examples.

Q.

The atomic number of an element that belongs to the IVA group and 4th period is ___________.

Q.

Write the electronic configuration of carbon.

Q. The electronic configuration of nitrogen is 2, 5. How many electrons in the outer shell of the nitrogen atom are not involved in the formation of a nitrogen molecule.

Q. In a helium there are 2electron and 2 nutron so that the shell shrinks . Due to which force and why it shrinks
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Q.

An atom of an element (X) has its K, L and M shells filled with some electrons. It reacts with sodium metal to form a compound NaX. The number of electrons in the M shell of the atom (X) will be ___

Q.

Which of the following is the correct electronic configuration of a Sodium atom?

1. 2, 8, 2

2. 2, 5, 2

3. 2, 8, 1

4. 2, 2, 2

Q. The number of electrons lost to convert 6 atoms of A to their stable ions is equal to the number of electrons gained to stabalize 4 atoms of B. If the atomic number of A is 20, what is the charge on the stable ion B?