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Periodic Classification of Elements

Three elements B, Si and Ge are
(a) metals
(b) non-metals
(c) metalloids
(d) metal, non-metal and metalloid respectively

06/11/2024

Science

10th

Periodic Classification of Elements

What type of oxide would Eka– aluminium form?
(a) EO3
(b) E3 O2
(c) E2 O3
(d) EO

06/11/2024

Science

10th

Periodic Classification of Elements

Arrange the following elements in the order of their increasing nonmetallic character Li, O, C, Be, F
(a) F < O < C < Be < Li (b) Li < Be < C < O< F (c) F < O < C < Be < Li (d) F < O < Be < C < Li

06/11/2024

Science

10th

Periodic Classification of Elements

Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, Al
(a) Cl > Si >Al > Mg >Na
(b) Na >Mg >Al >Si > Cl
(c) Na > Al > Mg > Cl > Si
(d) Al > Na> Si > Ca> Mg

06/11/2024

Science

10th

Periodic Classification of Elements

Which of the following are the characteristics of isotopes of an element?
(i) Isotopes of an element have same atomic masses
(ii) Isotopes of an element have same atomic number
(iii) Isotopes of an element show same physical properties
(iv) Isotopes of an element show same chemical properties
(a) (i), (iii) and (iv) (b) (ii), (iii) and (iv)
(c) (ii) and (iii) (d) (ii) and (iv)

06/11/2024

Science

10th

Periodic Classification of Elements

Which of the following elements does not lose an electron easily?
(a) Na
(b) F
(c) Mg
(d) Al

06/11/2024

Science

10th

Periodic Classification of Elements

Which of the following elements would lose an electron easily?
(a) Mg
(b) Na
(c) K
(d) Ca

06/11/2024

Science

10th

Periodic Classification of Elements

Which among the following elements has the largest atomic radii?
(a) Na
(b) Mg
(c) K
(d) Ca

06/11/2024

Science

10th

Periodic Classification of Elements

Which of the following gives the correct increasing order of the atomic radii of O, F and N ?
(a) O, F, N
(b) N, F, O
(c) O, N, F
(d) F, O, N

06/11/2024

Science

10th

Periodic Classification of Elements

Which one of the following elements exhibit maximum number of valence electrons?
(a) Na
(b) Al
(c) Si
(d) P

06/11/2024

Science

10th