Rewrite the following statements after correction, if necessary:

(a) Groups have elements with consecutive atomic numbers.
(b) Periods are the horizontal rows of elements.
(c) Isotopes are the elements of the same group.

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Solution

(a) Periods have elements with consecutive atomic numbers.
(b) The statement is correct.
(c) The statement is correct.

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Similar questions

Q. State whether the following statements are true of false:

(a) Newlands divided the elements into horizontal rows of eight elements each.
(b) According to Mendeleev's periodic law, the properties of elements are a periodic function of their atomic numbers.
(c) The elements in a group have consecutive atomic numbers.

Q. Rewrite the following statements after correction, if necessary:

(i) Elements in the same period have equal valency
(ii) The metallic character of elements in a period increases gradually on moving from left to right.

(a) What are the periods and groups in a periodic table? Give two characteristics of each.

(b) In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group.

$\begin{matrix} L i & B e N a K R b C s F r & R a \end{matrix}$

(i) What happens to the size of atoms?

(ii) What happens to their metallic character?

(d) Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?

(e) Rewrite the following statement after correction, if necessary :

Groups have elements with consecutive atomic numbers.

Q. (a) What are the periods and groups in a periodic table? Give two characteristics of each.
(b) In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group.
(c) Given alongside is a part of the periodic table. As we move vertically downward from Li to Fr:

Li	Be
Na
K
Rb
Cs
Fr	Ra

(i) What happens to the size of atoms?
(ii) What happens to their metallic character?
(d) Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?
(e) Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.

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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Rewrite the following statements after correction, if necessary: (a) Groups have elements with consecutive atomic numbers. (b) Periods are the horizontal rows of elements. (c) Isotopes are the elements of the same group.

(a) Periods have elements with consecutive atomic numbers. (b) The statement is correct. (c) The statement is correct.

Rewrite the following statements after correction, if necessary:

(a) Groups have elements with consecutive atomic numbers.
(b) Periods are the horizontal rows of elements.
(c) Isotopes are the elements of the same group.

(a) Periods have elements with consecutive atomic numbers.
(b) The statement is correct.
(c) The statement is correct.