Advertisements
Advertisements
प्रश्न
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
Advertisements
उत्तर
If an atom loses an electron, it acquires positive a charge
APPEARS IN
संबंधित प्रश्न
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?
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
WRITE SHORT ANSWER
What is radioactivity?
Write the names of the elements present in the:-
Acetic acid
Write the names of `"Na"_3"PO"_4` compounds :
Define: Relative atomic mass
Who originated the word ‘atom’ ?
Define: An Atom:
Fill in the blank
An _______ is electrically neutral.
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
The basic unit of matter is ______.
Define – Atom.
Name the sub-atomic particles.
Atoms of different elements having the same number of ______ are called isotones.
The number of atoms present in a molecule is called its ______.
______ is a substance that is made up of three oxygen atoms chemically combined.
The first scientific theory about atoms was given by J J. Thomson.
