Question

Define :

1. Orbit

2. Valency

3. Positive valency

4. Negative valency

5. Periods

6. Groups

7. Atomic number

8. Periodic table​

Answer 1

Explanation:

1. An orbit is a regular, repeating path that one object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like Earth or the moon. ... Planets, comets, asteroids and other objects in the solar system orbit the sun.
2. Valency is the measure of the combining capacity of atoms or molecules. Therefore, it is the capacity of an atom of a single element to react and combine with particular numbers of atoms of another element.
3. the valence of a positively charged ion. 2 : the number of electrons an atom can give up sodium has a positive valence
4. the valence of a negatively charged ion. 2 : the number of electrons an atom can take up oxygen has a negative valence
5. period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.
6. group is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns are not numbered.
7. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
8. The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends