Chapter 1 ST

What is the number of protons that the element in this image contains?

• 14

• 7

• 15

• 21

The second energy level (electron shell) can hold up to how many electrons?

• 8

• 4

• 2

• 5

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its

• nucleus

• energy level

• core

• electron shell

Particles in an atom that are neutral (have no charge) are

• negatrons

• electrons

• neutrons

• protons

An atom's overall charge is

• positive

• depends on its mood

• neutral

• negative

Which of the following is a negatively charged subatomic particle?

• Electron
• Proton
• Neutron
• Quark

The majority of an atom's mass exists where?

• In the nucleus

• In the electron cloud

• In the space between the nucleus and the electrons

• In the energy levels

Ernest Rutherford discovered that atoms were mostly:

• Negatively charged
• Positively charged
• Electrons
• Empty space

What does the nucleus of an atom contain?

• all the positive charge and little of the mass

• all the positive charge and most of the mass

• all the negative charge and little of the mass

• all the negative charge and most of the mass