An atom has mass number 23 and atomic number 11. The atom has _____ electrons, ____ protons and _____neutrons.
11, 12, 13
11, 11, 12
11, 11, 13
11, 14, 15
In a stationary orbit of an atom the electron will be
Revolving with constant energy
At rest
Losing energy constantly
Losing energy discontinuously.
Which of the following electronic configurations represents a noble gas?
2, 8, 2
2, 8 ,6
2, 8
2, 8, 8, 2
The firmness with which an electron is held by an atom is a measure of its.
Electronegativity
Ionisation potential
Ionic character
Metallic character
Bohr’s model can explain.
Spectrum of hydrogen atom only
Spectrum of any atom or ion having one electron only
Spectrum of hydrogen molecule
Solar spectrum
Which of the following statements is not true?
Most of the space in an atom is empty
The total number of neutrons and protons is always equal
The total number of electrons and protons in an atom is always equal
The total number of electrons in any energy level can be calculated by the formula 2n2
Bond length decreases with.
Increase in the size of the atom
Increase in the number of bonds between the atoms
Decrease in the number of bonds between the atoms
Decrease in the bond angle.
Positive charge is an atom is.
Scattered all over the atom
Concentrated in the nucleus
Revolving around the nucleus
None of these
The nucleus of an atom has atomic number 17 and mass number 37. There are 17 electrons outside the nucleus. Then the number of neutrons in it is.
20
21
17
37
