Chemistry
The inert gas filled in electric bulbs is:
- Helium
- Argon
- Neon
- Both (1) and (3)
Related Questions
Brass and bronze are:
- elements
- mixtures
- compounds
- all of the above
The hardest naturally occuring substance is:
- graphite
- iron
- diamond
- coal
Which of the following metals is used to make heavy tools and machines?
- Iron
- Aluminium
- Copper
- Silver
Fill in the blanks:
(a) …………… refers to the number of atoms in the molecule of an element.
(b) The most abundant element in the earth's crust is …………… .
(c) A metal which is a liquid at room temperature is …………… .
(d) The most abundant element in the atmosphere is …………… .
(e) A metal which is a poor conductor of electricity is …………… .
(f) A diatomic gaseous element is …………… .
(g) A liquid non-metal is …………… .
(h) Elements that do not react chemically are …………… .
(i) The Latin name of iron is …………… .
(j) The horizontal rows in the Periodic table are called …………… .
(k) The vertical columns in the Periodic table are called …………… .