Advertisements
Advertisements
प्रश्न
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
Advertisements
उत्तर
| Element | At.Numbers |
Electronic Configuration K L M N |
| 1. Oxygen | 8 | 2 6 |
| 2. Fluorine | 9 | 2 7 |
| 3. Sodium | 11 | 2 8 1 |
| 4. Silicon | 14 | 2 8 4 |
| 5.Argon | 18 | 2 8 8 |
APPEARS IN
संबंधित प्रश्न
If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.
Define:- Molecule
Write the names of the elements present in the:-
Glucose
Write the names of the elements present in the:-
Acetic acid
Write the names of `("NH"_4)_2"SO"_4` compounds:
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Fill in the blank
If an atom gains an electron, it is called an _______
Write the relation between nanometre and metre.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
What is an atom ? How do atoms usually exist ?
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.
In what respects do the three isotopes of hydrogen differ? Give their structures.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
Define the following term with an example.
Metal
Does the solubility of a substance change with temperature? Explain with the help of an example.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
