Question

Find the correlation: Group 1: Alkali metals :: Group 17:---- * 1 point A) Metalloids B) Halogens C) Alakaline earth metals D) Metals This is a required question 5) Name the following: The element with electronic configuration (2,7). * 1 point A) Oxygen B) Fluorine C) Carbon D) Neon 6) State the number of elements in the modern periodic table. * 1 point A) 118 B) 115 C) 116 D) 117 7) The molecular formula of Beryllium is-----------. * 1 point A) B B) Be C) Br D) Ba 8) An element has its electronic configuration as 2,8,2. What is the atomic number of this element? * 1 point A) 2 B) 8 C) 10 D) 12 9) Name the element having one shell and one valence electron. * 1 point A) Hydrogen B) Helium C) Lithium D) Beryllium 10) ------ is the distance between the nucleus of the atom and its outermost shell. * 1 point A) Atomic mass B) Atomic radius C) Atomic number D) Electronic configuration

Answer 1

Answer:

Group 1:-alkali metals

Group 17:- B)Halogen

Answer 2

Answer:

B) Halogens

5) Fluorine

6) 118

7) Be

8) 12

9) Hydrogen

10) Atomic radius

Explanation:

• The group 17 elements are termed halogens.

• The element Fluorine has atomic number 9, thus electronic configuration is 2,7.

• The modern periodic table has 118 known elements.
• The molecular formula of Beryllium is Be.
• The atomic number of the element with electronic configuration 2,8,2 is 12.
• The element with one valence electron and one shell is the hydrogen with atomic number 1.
• The distance between the nucleus and the outermost shell of an atom is the atomic radius.