Atomic Structure Test - 8

Atomic size increased down the group and decreases in the period from left to right.

So, calcium (Ca) is the largest size.

Hence, the correct option is A

According to the question the correct option will be option ‘C’ because Dalton's atomic theory states that atoms are the smallest unit of matter that can participate in a chemical reaction. Chemical reactions involve the combination, separation, or rearrangement of atoms, but atoms are neither created, destroyed, divided into parts, or converted into atoms of any other kind.

According to the question the correct option will be option (b) because Greek philosophers such as Democritus and Epicurus suggested that matter is made up of tiny indivisible particles called atoms. The word atom is derived from the Greek word atomos, which means indivisible or uncut.

According to the question the correct option will be option ‘D’ because An element cannot be further broken down by chemical means.

An element is defined as a substance that cannot be decomposed by a simple chemical process into two or more different substances. 

According to the question the correct option will be option ‘A’ because Nucleus is composed of protons and neutrons.

According to the question the correct option will be option ‘A’ because  all the mass of the atom resides in the nucleus.

According to the question the correct option will be option ‘A’ because  In a group, on moving down the group, the atomic radius increases as electrons are added to the new shell.

Hence, the smallest atom is F.

According to the question the correct option will be option ‘A’ because Atoms combine with each other to stabilize each other.

Hence the correct option is A.

According to the question the correct option will be option ‘D’ because Several Western philosophers like Plato, Aristotle, Democritus, Lucretius, etc believed that matter is composed of extremely small and indivisible particles called atom.  Atom is a Greek word which means indivisible.

According to the question the correct option will be option ‘B’ because John Dalton considered that "all matter is composed of small particle called the atom."

According to Dalton,

• Atom is the smallest indivisible part of matter which takes part in the chemical reaction.
• Atom is neither created nor be destroyed.

According to the question the correct option will be option ‘B’ because Valence electrons are electrons in the outermost shell and they are responsible for determining the number of bond formation and an atoms charge. this give the atom its chemical properties.

The three subatomic particles of atom are: electrons, protons and neutrons.

According to the question the correct option will be option ‘A’ because Protons and neutron are present in the nucleus of the atom residing at the center

DALTON'S ATOMIC THEORY: According to the question the correct option will be option ‘A’ as-

Matter is made up of very small indivisible particle called atoms.

All the atoms of a given element is identical in all respect i.e. mass, shape, size, etc.

Atoms cannot be created nor destroyed by any chemical process.

Atoms of different elements are different in nature.

According to the question the correct option will be option ‘C’ because the particles present in the nucleus of an atom are the proton and the neutron.
Electrons are present outside the nucleus.