Chemistry
Grade-9
Easy
Question
How many electrons does potassium K contain?
- 19
- 39
- 20
- 40
Hint:
For a neutral atom number of proton is equal to number of electron.
The correct answer is: 19
- For a neutral atom number of proton is equal to number of electron.
- Atomic number = number of protons.
- Atomic number of potassium is 19, hence number of electron is 19.
Related Questions to study
Chemistry
What element is represented in this Bohr Model?
What element is represented in this Bohr Model?
ChemistryGrade-9
Chemistry
How many valence electrons does Magnesium Have?
How many valence electrons does Magnesium Have?
ChemistryGrade-9
Chemistry
How many valence electrons does Nitrogen Have?
How many valence electrons does Nitrogen Have?
ChemistryGrade-9
Chemistry
How many valence electrons does Helium Have?
How many valence electrons does Helium Have?
ChemistryGrade-9
Chemistry
How many valence electrons does Hydrogen Have?
How many valence electrons does Hydrogen Have?
ChemistryGrade-9
Chemistry
Which family of elements are the most reactive?
Which family of elements are the most reactive?
ChemistryGrade-9
Chemistry
Which family of elements is the least reactive?
Which family of elements is the least reactive?
ChemistryGrade-9
Chemistry
The __________________ of an element is the tendency to release energy.
The __________________ of an element is the tendency to release energy.
ChemistryGrade-9
Chemistry
A ________________________ is an electron located in the outermost shell.
A ________________________ is an electron located in the outermost shell.
ChemistryGrade-9
Chemistry
Elements in the same family have similar _______________.
Elements in the same family have similar _______________.
ChemistryGrade-9
Chemistry
Which group includes the non-metals that can exist in liquid form at normal temperature?
Which group includes the non-metals that can exist in liquid form at normal temperature?
ChemistryGrade-9
Chemistry
Noble Gases are found in ____________.
Noble Gases are found in ____________.
ChemistryGrade-9
Chemistry
Which group of the periodic table does a diatomic elemental gas with a pale yellow colour belong to?
Which group of the periodic table does a diatomic elemental gas with a pale yellow colour belong to?
ChemistryGrade-9
Chemistry
Halogens are in the group number
Halogens are in the group number
ChemistryGrade-9
Chemistry
The true statement among the following is
The true statement among the following is
ChemistryGrade-9
