Advertisements
Advertisements
Question
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Advertisements
Solution
What is the charge on the particle – 1 (negative)
APPEARS IN
RELATED QUESTIONS
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
WRITE SHORT ANSWER
Define an ionic compound.
Define:- Molecule
Write the names of the elements present in the :-
Sulphuric acid
Name the particles which revolve around the nucleus.
Name the particle or particles you would expect to find in :
The orbit of an atom
Write the full form of IUPAC.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
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?
Define the following term with an example.
Element
The basic unit of matter is ______.
Draw the structure of an atom and explain the position of the sub-atomic particles.
Define the following term with an example.
Metalloid
In all atoms of an element
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
______ is a substance that is made up of three oxygen atoms chemically combined.
