Chapter 2

Question 0

Law of multiple proportions

Answer 0

Different compounds made of the same elements will differ in number of atoms of each kind or arrangement

Question 1

Law of definite proportions

Answer 1

Different samples of the same compound will always have the same elements of the same amount and arrangement

Question 2

When was the electron “discovered” and who by

Answer 2

1890 William cook (cathode ray)

Question 3

J.J. Thompson was famous for

Answer 3

The plum pudding model

Question 4

Ernest Rotherferd did what experiment to determine that there was a nucleus at the center, and what year

Answer 4

Gold foil, 1910

Question 5

Ernest Rutherford is credited with what

Answer 5

Planetary model

Question 6

Neutron was discovered in

Answer 6

1932

Question 7

Isotope

Answer 7

The same atom with different number neutrons

Question 8

Rows in periodic table

Answer 8

Periods

Question 9

Columns in periodic table

Answer 9

Groups

Question 10

What are the diatomic molecules

Answer 10

H N O   F 
            Cl
            Br 
              I 
             At

Question 11

Empirical formula

Answer 11

Shows the simplest whole number ratio of the formula

Question 12

Has less electrons giving it a positive charge

Answer 12

Cation

Question 13

Anion

Answer 13

Has more electrons giving it a negative charge