Equations WorRsheet t0 lS 00 Chemical 1. Give the name of the element for each o

Question

Equations WorRsheet t0 lS 00 Chemical 1. Give the name of the element for each of the following chemical symbols: A) Na SecsaiM C) Mg Maa resiun Silicon B) Si D) He heliun ium F) O 2. Classify the following as a metal, nonmetal, or metalloid. A) Na C) Mg B) Si D) He 3. A) The Group 1 elements are called the B) The Group 17 elements are called the 4. Complete the following table: Element or Ion Number of protons Number of electrons Number of neutrons 180 36CI 0Ca2 5. Solid Magnesium, Mg, reacts with liquid bromine, Br2, to form MgBr2. i) Which element loses electrons? i) Will magnesium become a ii) Write the formula of a compound formed by the reaction of calcium, positive or negative) ion? Ca, with chlorine, Cl2.

Explanation / Answer

1. Ans:-

A) Na - Sodium B) Si - Silicon C) Mg - Magnesium

D) He - Helium E) Li - Lithium F) O - Oxygen

2. Ans:-

A) Na - Metal B) Si - Metalloid C) Mg - Metal

D) He - Nonmetal E) Li - Metal F) O - Nonmetal

3. Ans:-

A) The Group 1 elements are called the Alkali metals.

B) The Group 17 elements are called the Halogens.

4. Ans:-

The number of protons in the nucleus represents the atomic number.

Atomic mass number is the sum of number of protons and number of neutrons in the nucleus.

As per my knowledge 36Cl isotope does not exists. The isotopes of Chlorinr are 35Cl and 37Cl.

5. Ans:-

i) Magnesium looses two electrons to form Mg2+ ion.

ii) Magnesiun become a positive ion.

iii) Ca + Cl2  ===== CaCl2 ( Calcium Chloride )

Element or Ion Number of protons Number of electrons Number of neutrons 18O 8 8 10 36Cl 17 17 19 40Ca2+ 20 18 20

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