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WorksheetsNarayana eTechno school JEE revision
Total questions: 15
Worksheet time: 5mins
The species Iso electronic with CO is
CN-
OH
N2+
O2
In a neutral atom number of electrons=
Number of protons
Number of neutrons
The protons and neutrons present in the nucleus
None of these
Number of neutrons present indeuterium isotope of hydrogen is
2
3
5
1
Among the following which is not isoelectronic with O-2
F-
Ti+
Na+
N-3
Atoms of an element which differ in their mass numbers but same atomic numbers are called
Mass number
Atomic number
Isotope
Isobars
The lightest radioactive element in the periodic table is
Tritium
Deuterium
Protium
All the above
How many electrons present in PCl3
40
60
65
66
The nucleus of the element having atomic number 25 and atomic weight 55 will contain
25 protons and 30 neutrons
25 neutrons and 30 protons
55 protons
55 neutrons
Which of the following element has atomic number 29
Cr
Mn
Cu
Ni
How many neutrons are present in the element with atomic number 26
35
30
40
45
How many number of neutrons present in argon
22
23
24
25
If the atomic weight of an element is 23 times that of the lightest element and jt has 11 protons,then it contains
11 protons,23 neutrons,11 electrons
11 protons,11 neutrons,11 electrons
11 protons,12 neutrons,11 electrons
11 protons,11 neutrons,23 electrons
In nucleus of Ca,there are
40 protons and 20 electrons
20protons and 40 electrons
20 protons and 20 neutrons
20 protons and 40 neutrons
Statement1:The atoms of different elements having same mass number but different atomic number are known as Isobars
Statement2:The sum of protons and neutrons in isobars is always different
Both statements 1 and 2 are correct
Both statements 1 and 2 are incorect
Statement 1 is correct and statement 2 is incorrect
Statement 1 is incorect and statement 2 is correct
Among the following statements are correct
Isotopes have same number of neutrons
Isobars have same number of neutrons
Isotones have same number of neutrons
Isobars are atoms of different elements
