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Which property of an element is always a natural number?

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Important Questions on Atomic Structure

MEDIUM

Science>Chemistry>Atomic Structure>Atomic number

Consider an imaginary ion

{}_{22}^{48}X^{3 -}

. The nucleus contains '

a

%

more neutrons than the number of electrons in the ion. The value of '

a

' is

EASY

Science>Chemistry>Atomic Structure>Atomic number

The metal that gives hydrogen gas upon treatment with both the acid as well as the base is

EASY

Science>Chemistry>Atomic Structure>Atomic number

{}_{88}R^{226}

nucleus, there are

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Science>Chemistry>Atomic Structure>Atomic number

The reducing ability of the metals

K, A u, Z n

and

Pb

follows the order

EASY

Science>Chemistry>Atomic Structure>Atomic number

Atomic number of an element Z is

16

. Element Z has two isotopes

Z_{1}

and

Z_{2}

with

16

and

18

neutrons, respectively. The average atomic mass of a sample of the element Z is

32.1 μ

. Which one of the following percentage of

Z_{1}

and

Z_{2}

in the sample is correct?

MEDIUM

Science>Chemistry>Atomic Structure>Atomic number

Two elements P and Q have

5

and

7

electrons in their outermost shell respectively. The atomic number of P and Q will be

MEDIUM

Science>Chemistry>Atomic Structure>Atomic number

An atom has electronic configuration 2, 8. 7. What is the atomic number of this element.

EASY

Science>Chemistry>Atomic Structure>Atomic number

Mass number of an element is 37 and number of protons is 17. The element has:

EASY

Science>Chemistry>Atomic Structure>Atomic number

A nitrogen atom contains

7

protons,

7

electrons and

7

neutrons. Why is it that the atomic mass of nitrogen is

14

and not

21

MEDIUM

Science>Chemistry>Atomic Structure>Atomic number

Bromine is available in the form of two samples

{}_{35}^{79}{Br}

(49.7%) and

{}_{35}^{81}{Br}

(50.3%). The average atomic mass of bromine is:

EASY

Science>Chemistry>Atomic Structure>Atomic number

The subatomic particle whose number is always fixed in one particular kind of an element is:

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Science>Chemistry>Atomic Structure>Atomic number

The number of electrons in an element X is 9 and number of neutrons 10. The correct representation of X is:

EASY

Science>Chemistry>Atomic Structure>Atomic number

Atomic number of chlorine is 17,

{Cl}^{-}

will have

MEDIUM

Science>Chemistry>Atomic Structure>Atomic number

What is mass number of an element? How is the mass number related to the protons and neutrons present in the nucleus of an atom? Is it same as atomic number?

EASY

Science>Chemistry>Atomic Structure>Atomic number

If the number of electrons in an atom is

8

and the number of protons is also

8

, then
(i) What is the atomic number of the atom?
(ii) What is the charge on the atom?

EASY

Science>Chemistry>Atomic Structure>Atomic number

Protons and neutrons are also called?

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Science>Chemistry>Atomic Structure>Atomic number

Define atomic number.

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Science>Chemistry>Atomic Structure>Atomic number

An atom has electrons equal to

MEDIUM

Science>Chemistry>Atomic Structure>Atomic number

Mass number of an element is

40

and it has

18

protons, number of neutrons in the atom is:

EASY

Science>Chemistry>Atomic Structure>Atomic number

Mass number is defined as:

Which property of an element is always a natural number?

Important Questions on Atomic Structure

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