Advertisements
Advertisements
Question
Mass of one atom of oxygen is
Options
`16/(6.023 xx 10^23)"g"`
`32/(6.23 xx 10^23) "g"`
`1/(6.023 xx 10^23)"g"`
8u
Advertisements
Solution
`16/(6.023 xx 10^23)"g"`
Mass of one atom of oxygen
= `"Atomic mass"/"N"`
`16/(6.023 xx 10^23)"g"`
APPEARS IN
RELATED QUESTIONS
The atomic number of an element X is 13. What will be the number of electrons in its ion X3+ ?
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of element X will be :
How are the elements with variable valency named? Explain with an example.
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Oxide
Match the non-metallic elements – with their correct symbols. Non-metallic elements are:
| Non-Metallic elements | Symbol |
| (a) Carbon | (1) O |
| (b) Chlorine | (2) I |
| (c) Oxygen | (3) Si |
| (d) Phosphorus | (4) C |
| (e) Hydrogen | (5) Cl |
| (f) Nitrogen | (6) P |
| (g) Iodine | (7) F |
| (h) Bromine | (8) H |
| (i) Fluorine | (9) S |
| (j) Silicon | (10) Br |
| (k) Sulphur | (11) N |
Give the names and symbols of the first twenty elements of the periodic table.
Select the correct answer from the choice given below.
The type of element-phosphorus
Give the symbol of the following element:
Sulphur [sulphide]
State the type of element for the following:
Radon
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Copper
write symbol with the variable valency
