FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -So, horizontal rows in the periodic table are known as periods.

Detailed explanation-2: -The horizontal rows in the modern periodic table are called periods. The modern periodic table contains 7 periods. Q.

Detailed explanation-3: -The horizontal arrangements of the number are called rows and the vertical arrangement is called the column.

Detailed explanation-4: -A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

Detailed explanation-5: -The periodic table has seven horizontal rows and 18 vertical columns. The horizontal rows have metals towards the left and nonmetals on the right. The vertical columns have elements having similar chemical behaviours. The horizontal rows are called period and the vertical columns are called groups.