Which of the following statement about the modern periodic table is correct?

(a) It has 18 horizontal rows known as periods. (b) It has 7 vertical columns known as periods.

(c) It has 18 vertical columns known as groups. (d) It has 7 horizontal rows known as groups.

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Solution

(c) It has 18 vertical columns known as groups.
In the modern periodic table, there are 18 vertical columns known as groups.

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Similar questions

Q. Assertion :The Modern Periodic Table has 7 horizontal rows known as periods. Reason: The atoms of different elements which have the same number of occupied shells are placed in the same period. A period indicates the principal quantum number of the outermost shell of an element.

Q. According to Mendeleev’s periodic table, the vertical columns and horizontal rows are respectively called as:

Fill in the following blanks with suitable words :

(a) The basis for the modern periodic table is ……………

(b) The horizontal rows in a periodic table are called ……………

(d) Group 17 elements are known as ……………

(e) Group 18 elements are called ……………

(f) According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the …………… element starting from oxygen.

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Q. The long form of the periodic table consists of ______ horizontal rows and _______ vertical columns.

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Which of the following statement about the modern periodic table is correct? (a) It has 18 horizontal rows known as periods. (b) It has 7 vertical columns known as periods. (c) It has 18 vertical columns known as groups. (d) It has 7 horizontal rows known as groups.

(c) It has 18 vertical columns known as groups. In the modern periodic table, there are 18 vertical columns known as groups.

Which of the following statement about the modern periodic table is correct?

(a) It has 18 horizontal rows known as periods. (b) It has 7 vertical columns known as periods.

(c) It has 18 vertical columns known as groups. (d) It has 7 horizontal rows known as groups.

(c) It has 18 vertical columns known as groups.
In the modern periodic table, there are 18 vertical columns known as groups.