Modern Chemistry Ch. 3 Application

electron cloud

Most of the volume of an atom is in the

electrons

Since any metal cathode used in a cathode ray tube produced the same charged particles, it was concluded that all atoms contain...

mole

The amount of a substance that contains the number of particles equal to the number of atoms in exactly 12 g of carbon-12 is called a ...

32

The atomic number of nickel-60 is 28. How many neutrons does this isotope have?

Dalton

The basic principles of modern atomic theory were first conceived by

negative particles

The behavior of cathode rays in glass tubes containing gas at low pressure led to conclusion that the rays were composed of ...

atomic number

The number of protons in the nucleus of an element is called its

nuclear forces

The short-range attractive forces that hold nuclear particles together are called ...

mass number

The total number of neutrons and protons in the nucleus of an isotope is called its

Rutherford's Gold Foil experiments

a small % of + charged particles hitting the metal's surface were deflected back toward the source in which experiment

Miliken's Oil drop experiments

the approximate value of the electron's mass was determined by what experiment

14

An atom of silicon-30 contains 14 protons. How many electrons does it have?

CO and CO2

An example of the law of multiple proportions is the existence of

isotopes

Atoms of one element that have different masses are called..

mass number

Atoms of the same element can differ in number of neutrons which affects the...

6

Carbon-14 has 8 neutrons. What is the atomic number of carbon-14?

all atoms of the same element have the same mass

Dalton's atomic theory agreed with modern atomic theory except he said...

conservation of mass

Dalton's atomic theory helped explain that mass could not be created or destroyed. This is known as the law of...

conservation of mass

Dalton's atomic theory helped explain the law of...

multiple proportions

If 2 or more compounds are composed of elements A and B, the ratio of the masses of B combined with 1 g of A and 3 grams of B This demonstrates the law of ...

law of definite proportions

If a particle compound is composed of elements A and B, the ratio of the mass of B to the mass of A will always be the same. This is an example of ...