Question

Which of the given element a b c d and e with atomic number 237 10 and 30 respectively belong to the same period?

Answer 1

Answer:

elements B,C,D belongs to same period ....

they have 2 as valence shell .In all.....

Explanation:

pls mark the answer as brainlist

Answer 2

Answer:

Elements b,c, and d belong to the same group.

Explanation:

The first period contains 2 elements. The second period contains 8 elements. The third period contains 8 elements. Therefore,

• The first period contains 1 to 2 atomic numbers.
• The second period contains 3 to 10 atomic numbers.
• The third period contains 11 to 18 atomic numbers.
• The fourth period contains 19 to 36 atomic numbers.

So b, c, and d belong to the same period.

Facts:

• Groups are the columns of the periodic table, and periods are the rows.
• There are 18 groups, and there are 7 periods and the lanthanides and actinides
• There are seven horizontal rows called periods in the long-form periodic table.
• Thus, there are seven periods in the long-form periodic table.
• The elements of Groups 1, 2, and 13 to 17 are called the main group elements.
• These are also called typical or representative or normal elements