Question Detail

Atomic number is equal to

Number of electrons
Number of nutron
Number of protons
Total number of protons and neutrons

Answer: Option C

Similar Questions :

1. Why is phosphorus kept under water ?

to make it wet
to make it durable
water forms a protective coating on it
to save it from catching fire when exposed to dry air

Answer: Option D

2. Petroleum is found in ?

Marshy land
Metamorphic rocks
Igneous rock
Sedimentary rocks

Answer: Option D

3. What is used to avoid melting of ice ?

Gelatine
Butane
Methane
Any acid

Answer: Option A

4. Alloys made with mercury as one metal are called ?

mixtures
emulsions
solders
amalgams

Answer: Option D

5. Air is a

compound
colloid
element
mixture

Answer: Option D

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