Advertisements
Advertisements
Question
The electron shell ______ is nearest to the nucleus.
Advertisements
Solution
The electron shell K is nearest to the nucleus.
RELATED QUESTIONS
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
WRITE SHORT ANSWER
Name three inert gases.
Define:- Atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Fill in the blank
A charged particle is called an _____
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
What value has been given to the mass of this reference atom ?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
A compound containing one atom of carbon and two atoms of oxygen is ______.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
In the nucleus of `""_20"Ca"^40`, there are ______
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Which of the following has maximum number of atoms?
A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
______ is a substance that is made up of three oxygen atoms chemically combined.
What are the 3 most abundant atoms on the earth?
