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Chemistry

Modern periodic table is used to predict:
P — Whether an element is solid, liquid or gas.
Q — The nature of chemical bonds formed when elements combine.
R — The formula of the compound formed when elements combine.
Only P
Only Q
Only R
Both Q and R

Periodic Table

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Answer

Both Q and R

Reason — Modern periodic table can be used to predict nature of chemical bond, formula of compound formed and properties of that compound.

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Related Questions

Look at the periodic table given below and answer the following questions.
Groups I II III IV V VI VII VIII
Oxide:
Hydride: R₂O
RH RO
RH₂ R₂O₃
RH₃ RO₂
RH₄ R₂O₅
RH₃ RO₃
RH₂ R₂O₇
RH RO₄

Periods
↓ A B A B A B A B A B A B A B Transition
Series
1 H
1.008
2 Li
6.939 Be
9.012 B
10.81 C
12.011 N
14.007 O
15.999 F
18.998
3 Na
22.99 Mg
24.31 Al
29.98 Si
28.09 P
30.974 S
32.06 Cl
35.453
(I) This table was given by:
Newland
Döbereiner
Mendeleev
Moseley
(II) According to this periodic table, the formula of the oxide of nitrogen is:
N₂O₃
NO
N₂O₅
N₂O₇
(III) The defect(s) of this periodic table is/are:
P — Anomalous pairs
Q — Separation of chemically similar elements.
R — Grouping of chemically dissimilar elements.
Only P
Both Q and R
Both P and Q
P, Q and R

Which of the following groups of modern periodic table has elements in all the three states i.e., solid, liquid, gas?
P — Group 18
Q — Group 17
R — Group 16
Only P
Only Q
Only R
Both Q and R
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Match column A with column B
Column A Column B
(a) Elements short by 1 electron in octet (i) Transition elements
(b) Highly reactive metals (ii) Noble gases
(c) Non-reactive elements (iii) Alkali metals
(d) Elements of group 3 to 12 (iv) Alkaline earth metals
(e) Radioactive elements (v) Halogens
(f) Elements with 2 electrons in the outermost orbit (vi) Actinides

Write down the word that will correctly complete the following sentences:
(a) Relative atomic mass of a light element up to calcium is approximately …………… its atomic number.
(b) The horizontal rows in a periodic table are called ……………
(c) Going across a period left to right, atomic size ……………
(d) Moving left to right in the second period, number of valence electrons ……………
(e) Moving down in the second group, number of valence electrons ……………
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