Question

1 What is a chemical bond?
2 What is a compound?
3 What is valency?
4 Explain why elements in Groups 1 and Vil of the periodio
table have the same valency
5 Use the cross over method to find the chemical formula
al sodium chloride
b) magnesium chloride​

Answer 1

Answer:

1. A chemical bond is the physical phenomenon of chemical substance being held together by attractions of atoms to each other through sharing, as well as exchanging, of electrons or electrostatic forces.

2. something that consists of two or more things or substances combined together.

3. A measurement of the power of an atom to combine with others, by the number of hydrogen atoms it can combine with or take place.

4. Elements of group one and seventeen have valency 1. This is because group 1 elements have 1 electron in their valence shell which they donate or share with another atom to become a positive ion with charge +1. In the same way, group seventeen atoms need only one more electron to become a negative ion with -1.

5. The chemical formula of sodium chloride is Nacl

The chemical formula of magnesium chloride is MgCl2

hope it helps you✌