Which of the following is not an example of Dobereiner's Traids a) Ca, Sr. Ba b) Cl, Br, I c) Li, Na, K d) Sr, Ba, Ra

Which of the following is not a true alkaline earth metal. (A) Be (B) Mg (C) Ca (D) Ba

Which of the following statements about the elements, Mg, Ca, Sr and Ba and their compounds is true?

Which of the following alkaline earth metals shows some properties similar to aluminium (A) Be (B) Ca (C) Sr (D) Ba

Can the following groups of elements be classified as Dobereiner's triad ? (a) Na, Si, Cl (b) Be, Mg, Ca Atomic mass of Be 9 , Na 23 , Mg 24 , Si 28 , Cl 35 , Ca 40 Explain by giving reason.

Which of the following is a representative element? (A) Zn (B) Sr (C) Cu (D) Fe

Which of the following species has the smallest size? (a) K^(o+), Sr^(2+), Ar , (b) Si, P, Cl , (c ) O, O^(ө), O^(2-)

How many of the following gives color to the flame test Li,Be,Na,Mg,Ca,Sr,Ba,K,Rb,Cs

Which of the following set of elements has the least tendency to form ionic compounds. (A) "Al,Na," B) Be,Li (C) "Ba,K (D) Cs,Ca