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1.All the elements belonging to a Group II A have___ electrons (s) in their outermost shell
A.1 B.2 C. 3 D. 4
2.The number of the protons in an atom represents the
A.ionization energy B. electrons negativity C.atomic number D. atomic mass
3.Which of the fallowing is an alkali metal
A.Ba B.Pb C. Li D. Fe
4.How many elements are in the fourth period of the periodic table
A.2 B.18 C. 6 D.8
5. An atom of phosphorus has an atomic number of 15 and the mass number of 31. How many neutrons does it contain?
A.14 B. 15 C. 16 D. 31
6.Which of the following sets is a set of all metals
A. S, Li, C B. He, Be, Ne C. K, Li, Na D. Ca, K, Co
7.Each vertical column of the periodic table is called
A.A period B.a row C. a group D. Nne of these
8.What family of elements includes helium and neon
A. noble gases B. alkali metals C. halogens D.none of these
9. Which of the following property decrease as it goes from left to right
A.lonization energy B.electronegativity C.reactivity to metals D. ELECTRONS affinity
10.Which of the following property increases as it goes from top to bottom
A.lonization energy B.electronegativity C.reactivity to metals D. ELECTRONS affinity
11. The following are property es of metals except
A.malleable B.brittleness C. uster D. ductile
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