What is an element? Name any five elements.
Element - It is a pure substance made up of atoms of the same kind and cannot be separated by any chemical method.
Five elements are:
ELEMENT
SYMBOL
Hydrogen
H
Carbon
C
Sulphur
S
Sodium
Na
Potassium
K
The electronic configuration of an element Z is 2, 8, 8. (a) What is the atomic number of the element? (b) State whether element Z is a metal or non-metal. (c) What type of ion (if any) will be formed by an atom of element Z? Why? (d) What is special about the outermost electron shell of the atom of this element? (e) Give the name and symbol of element Z. (f) Name the group of elements to which Z belongs.
An element has Z = 7. What is the valency of the element? Also, name the element.
What is an element? Name some common elements.
Name an element which does not posses any neutron ?
What is an element? Give any two characteristics.