Which statement about atom is incorrect?

Atoms are invisible

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All atoms have same number of protons and electrons

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Atoms are made up of subatomic particles

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It has mass

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Solution

The correct option is C All atoms have same number of protons and electrons
Atoms are smallest particle of an element.
They consists of solid mass in the center known as the nucleus in which protons and neutrons are present.
Outside the nucleus, there are present electrons which keep up on revolving around it.
Thus the atom is not mostly the empty space.
Hence this statement is $F a l s e$ .

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Similar questions

Assertion: The discovery of subatomic particles led to the failure of Dalton’s atomic theory.

Reason: An atom is made up of protons, neutrons and electrons.

Q. Atoms are made up of fundamental particles like electrons, protons and neutrons. What kind of charged species would an atom be?

Fill in the blanks in the following statements :

(a) The number of protons in the nucleus of an atom is called its ....................

(b) The total number of protons and neutrons in the nucleus of an atom is called its ....................

(d) An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ....................

(e) If the nucleus of an atom has atomic number 17, mass number 37 and there are 17 electrons outside the nucleus, the number of neutrons in it is ....................

(f) Almost all the mass of an atom is concentrated in a small region of space called the ....................

(g) Cathode rays are a beam of fast moving ....................

(h) The anode rays obtained from hydrogen gas consist of particles called ....................

(i) The maximum number of electrons that can be accommodated in L shell are ....................

(j) The maximum number of electrons that can go into the M shell is ....................

(k) The subatomic particle not present in a hydrogen atom is ....................

(l) The electron has .................... charge, the proton has .................... charge, and the neutron has .................... charge.

Q29) CERN announced discovery of the exotic subatomic particles pentaquarks which so far had existed in theory only. Which of the following statements is/are true about the below mentioned particles?

1) Pentaquark is a sub-atomic particle composed of five-quarks (four antiquarks and a quark).

2) A baryon is a composite subatomic particle made up of three quarks

3) Mesons are composed of one quark and one antiquark

4) Leptons are not quark-based

code:

Q. Statement I: All atoms of the same element are identical.
Statement II: All atoms of the same element have the same number of protons.

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