Chapter 4: Atoms

What is an Atom?

• a monkey
• something that takes up space 
• basic unit of the chemical element
• i dont know 

What 3 molecules make up an atom 

• neutrons protons electrons
• nucleus mass protons
• atomic compound mass

The number of atoms in 1 mol of carbon is

• 6.022 x 10²²
• 6.022 x10²³
• 5.022 x10²²
• 5.022 x 10²³

Oxygen-18 (atomic number 8) contains

• 8 neutrons
• 9 neutrons
• 10 neutrons
• 18 neutrons

The relative atomic mass of an atom can be found by comparing the mass of the atom to the mass of

• one atom of hydrogen-2
• one atom of carbon-12
• one atom of carbon-13
• one atom of carbon-14

As the mass number of an element’s isotopes of an element increases, the number of protons

• decreases
• increases
• stays the same
• doubles

What is the name of this element?

• Lithium
• Boron
• Carbon
• Neon

Tags

NGSS.MS-PS1-1

What element is this?

• P

• F

• B

• Mg

Tags

NGSS.MS-PS1-1

Who discovered the nucleus of an atom?

• JJ Thomson
• Ernest Rutherford
• John Dalton
• Democritus

What are electrons?

• Massive, positively charged particles
• Tiny, negatively charged particles
• Clouds of dust in the nucleus
• Neutral particles around the nucleus

Tags

NGSS.MS-PS1-1