Advertisements
Advertisements
प्रश्न
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
Advertisements
उत्तर
X
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Give two examples for each of ionic and covalent bond.
Name the particle or particles you would expect to find in :
The nucleus of an atom
What are the building blocks of matter ?
State two observations which show that atom is not indivisible.
One nm is equal to :
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Electron, proton, neutron are the types of ______ in an atom.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
An element is composed of ______ atoms.
The volume occupied by 4.4 g of CO2 at S.T.P ______
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
Atoms of one element can be transmuted into atoms of other elements by ______
1 mole of Gold and Silver contain same number of atoms.
A change in the physical state can be brought about
