Atoms and Particles

What particle provided the positive charge for an atom?

• proton 
• neutron
• electron
• nucleus

Complete the missing label on the diagram.

• Neutron
• Centre
• Nucleus
• Sub atomic particle

Tags

NGSS.MS-PS1-1

An atom has 25 protons and 30 neutrons. How many electrons are needed to make the atom neutral?

• 0

• 25

• 30

• 35

Each neutron has a _________________ charge.

• positive

• negative

• neutral

• shocking

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

In 1904 JJ Thompson discovered that atoms actually contained particles called electrons. Which of these best describes an electron?

• Much much smaller than the other particles, positively-charged

• Much much smaller than the other particles, negatively-charged

• Make up most of the mass of the atom, negatively-charged

• Contain most of the mass of the atom, no charge

Tags

NGSS.MS-PS1-1

How many elements are there on the periodic table?

• 90

• 206

• 118

• 156

What is labelled on the diagram as (c)?

• Proton

• Neutron

• Electron

• Nucleus

Tags

NGSS.MS-PS1-1

The smallest particle of an element is known as the

• Periodic Table

• Atom

• Group

• Period

Tags

NGSS.MS-PS1-1

What particle of the atom uniquely identifies/determines an element?

• Number of Valence Electrons

• Number of Protons

• Number of Electrons

• Atomic Mass