Write 853172069, separating periods.

Write 75624908, separating periods.

Write 86324805 separating periods in Hindu - Arabic system.

Write the following numbers by separting periods using commas: 94332705 (ii) 943875

Insert commas in the correct positions to separate periods and write the following numbers in words: 4275 (b) 24798 (iii) 857367

Insert commas to separate the periods in the Indian System of Numeration. Write and read each number: 708356149

Insert commas to separate the periods in the Indian System of Numeration. Write and read each number: 5530088

Insert commas to separate the periods in the Indian System of Numeration. Write and read each number: 47529311

Insert commas to separate the periods in the Indian System of Numeration. Write and read each number: 94381052

Insert commas in the correct positions to separate periods and write the following numbers in words: (i)9050784 (ii) 10105607 (iii)10000007 (iv) 910107104

Explain why hydrogen is best placed separately in the periodic table.