elements neah

A pure substance whose atoms are of the same type is called:

• a mixture

• an element

• a compound

• a metal

The lightest gas is:

• helium

• carbon dioxide

• hydrogen

• neon

The table that lists down the more than 100 elements is known as the:

• Mendeleev's table

• Periodic table

• Chemistry element table

• Octet table

Which of these is the correct symbol for magnesium?

• MG

• Mg

• Mag

• mg

Which of the following atomic symbols is written correctly?

• ee

• hE

• C

• CL

Which of the following atomic symbols for bromine is written correctly:

• bR

• BR

• Br

• br

The atomic number of an atom is the of:

• electron and neutron

• proton and neutron

• protons and electron

• neutron and proton

The place in the atom which contains the protons and the neutron is the:

• orbit

• nucleus

• shell or cloud

• shell

The negatively charged particle contains the protons and the neutron is the:

• electron

• neutron

• proton

• negatron

The positively charged particle in an atom is the:

• electron

• proton

• neutron

• negatron