Chapter 3 Review

states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass

• law of definite proportions

• law of conservation of mass

• law of multiple proportions

• periodic table

What were John Dalton three contributions to atomic history?

• Created the atomic theory

• Discovered that the atom is mostly empty space

• Believed that atoms of a given element are identical

• Hypothesized that the atom is a tiny, hard sphere

• Believed that the universe was made of tiny "uncuttable" particles

Tags

NGSS.MS-PS1-1

JJ Thomson discovered what subatomic particle

• nucleus

• neutron

• proton

• electron

Rutherford discovered what part of the atom

• nucleus

• neutron

• proton

• electron

This particle balances the charges from the protons to make the atom neutral

• proton

• electron

• neutron

• nucleus

Tags

NGSS.HS-PS1-7

These particles are found in the nucleus

• protons and electrons

• nucleus and neutrons

• protons and neutrons

• electrons and neutrons

Tags

NGSS.HS-PS1-8

Thomson Experimented with ______

• Gold Foil

• alpha particles

• cathode rays

• protons

Rutherford experimented with ____

• Gold foil and alpha particles

• Cathode rays and alpha particles

• electron and alpha particles

• gold foil and cathode rays

What charge is the proton?

• positive

• no charge (neutral)

• negative

• Senaida-charged

Tags

NGSS.MS-PS2-3

What charge is the neutron?

• no charge (neutral)

• positive

• negative

• Katlyn-charged