Y9 LC1 CHEM HWK WK4 - Isotopes and History of the atom

What is an atom mostly made up of?

• protons
• electrons
• empty space
• neutrons

Tags

NGSS.MS-PS1-1

Is the nucleus positively or negatively charged?

• positively
• negatively

What do like charges do?

• attract
• repel
• nothing

Tags

NGSS.MS-PS2-3

What was JJ Thomson responsible for finding?

• protons
• neutrons
• nucleus
• electrons

Ernest Rutherford discovered that the atom was mostly _________________ and has a _______________ charged nucleus.

• empty space, positively
• empty space, negatively
• full of protons, positively
• full of neutrons, negatively

Tags

NGSS.HS-PS1-8

Which experiment taught us that atoms are mostly empty space and have a positively charged nucleus?

• Plum Pudding Model
• Cathode Ray Tube
• Gold Foil Experiment
• Planetary Model

Tags

NGSS.HS-PS1-8

If an atom has extra neutrons, it is called a?

• Isotope
• Ion
• Cation
• Anion

Tags

NGSS.HS-PS1-8

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Tags

NGSS.MS-PS1-1

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.MS-PS1-1

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1