Chemistry
Which of the following is a pair of metalloids ?
- Na and Mg
- B and Si
- C and P
- He and Ar
Related Questions
The symbol of Beryllium is :
- B
- Ba
- Be
- Br
Which of the following properties is not shown by compounds ?
- They are heterogeneous.
- They are homogeneous.
- They have definite molecular formulae.
- They have fixed melting and boiling points.
Which of the following elements has atomicity 4?
- Iodine
- Ozone
- Phosphorus
- Sulphur
A molecule is the smallest unit of :
- an element
- a compound
- a mixture
- an ion