Question

Give the names and symbols of five familiar substances which you think are elements.

Answer 1

Hint: In chemistry, periodic tables play a vital role. In the periodic table there are totally \[118\] elements. In the periodic table there are totally \[18\] columns and \[7\] rows. The columns are called groups. Hence, \[18\] groups in the periodic table. The rows are called periods. Hence, totally \[7\] period in the table.
The electrons in the atom are filled by the lower energy level to the higher energy level. In modern periodic table elements are arranged in the table depending on the atomic number. In this way only periods and rows are arranged in the modern periodic table.

Complete answer:
In chemistry each element has a specific symbol in the periodic table.
The names and symbols of five familiar substances are elements.
The symbol of hydrogen is \[{\text{H}}\].
The symbol of helium is \[{\text{He}}\].
The symbol of lithium is \[{\text{Li}}\].
The symbol of beryllium is \[{\text{Be}}\].
The symbol of boron is \[{\text{B}}\].

Note:
We have to know that the atomic number of the atom is equal to the number of protons or the number of electrons. The atomic number of boron is \[5\]. The atomic number of beryllium is \[4\]. The atomic number of lithium is \[3\]. The atomic number of helium is \[2\]. The atomic number of hydrogen is \[1\]. In every atom the number of protons and the number of electrons are equal. The mass number of hydrogen is \[1\]. The mass number of helium is \[4\]. The mass number of lithium is \[6.9\]. The mass number of beryllium is \[9.6\]. The mass number of boron is \[10.8\].