Atomic Theory

Question 1

What law is this an example of

Answer 1

law of conservation of mass

Question 2

What law is this an example of?

Answer 2

Law of definite proportions or constant composition

Question 3

Analysis of 84.2 g of a uranium containing compound shows it is composed of 71.4 g of uranium, with oxygen as the only other element. How many grams of uranium can be obtained from 102 kg of the same compound?

Answer 3

8.65x10^4g

Question 4

What law is this an example of?

A green solid contains .558g Cl to 1g Cu

While a brown solid contains 1.116 g Cl to 1g Cu

Answer 4

Law of Multiple Proportions

Question 5

law of conservation of mass

Answer 5

atoms are neither created nor destroyed. the total mass of matter present when matter changes from one type to another will remain constant

Question 6

isotopes

Answer 6

atoms of the same element that differ in mass

Question 7

law of multiple proportions

Answer 7

when two elements react to form more than one compound, a fixed mass of one element will react with masses of the other element in a ratio of small, whole numbers

Question 8

atomic number

mass number

Answer 8

the number of protons, value determins identity of the atom

total number of protons and neutrons, number of neutrons equal to a-z

Question 9

ions

cations

anions

Answer 9

number of electrons is not equal to the number of protons

loses one or more electrons, positive charge

gains one or more eletrons, negative charge