Atomic construction

write the scientific term: The fundamental building unit of matter

The symbol of copper

• C

• Co

• Cu

• cu

Pb is the symbol of ............................ atom .

• phosphorous

• bromine

• lead

• potassium

.......................are neutral particles exist in the nucleus

• protons

• molecules

• neutrons

• electrons

The sum of the number of protons and neutrons in the nucleus of the atom is known as ..................................... number

• atomic

• mass

• valency

• density

The mass of the atom is concentrated in the ..................

• Protons

• nucleus

• neutrons

• electrons

The atomic number of an element having 6 protons and 6 neutrons in the nucleus is ...................

• 6

• 12

• 3

• 24

The mass number of an element having 6 protons and 6 neutrons in the nucleus is ...................

• 6

• 12

• 3

• 24

The electrons of potassium atom (₁₉K) are distributed in ................... energy levels

• one

• two

• three

• four

Answer explanation

The third energy level is saturated with ....................... electrons .

• 64

• 8

• 32

• 18