IPS Chemical Interactions Chapter 1 Section 2

Question 1

alkali metal

Answer 1

far left side of the periodic table; group 1; have only 1 valence electron except for lithium

Question 2

atomic number

Answer 2

an element is the number of protons in the nucleus of an atom

Question 3

chemical bond

Answer 3

force of attraction that holds two atoms together as a result of the rearrangement of electrons between them

Question 4

electron dot diagram

Answer 4

symbol for the element surrounded by dots

Question 5

family

Answer 5

elements in the same column

Question 6

group

Answer 6

elements in the SAME COLUMN

Question 7

halogen

Answer 7

has 7 valence electrons; atoms react easily with elements that have 1 electron to give

Question 8

noble gas

Answer 8

is a group of 18 elements; atoms of these elements have 8 valence electrons, except for helium which has 2; they do not react easily with other elements

Question 9

period

Answer 9

a ROW of elements ACROSS the periodic table

Question 10

symbol

Answer 10

consists of one or two letters- represents each element

Question 11

valence electrons

Answer 11

highest energy level and are held most loosley

Question 12

What are valence electrons?

Answer 12

those electrons that are in the highest energy level and held most loosely.

Question 13

What role do valence electrons play in the formation of compounds from elements?

Answer 13

When atoms bond, electrons may be transferred from one atom to another or they may be shared between the atoms to result in a chemical reaction where new substances form.