The Nature of Matter

Which of the following is a positively charged subatomic particle found in the nucleus of an atom?

• Electron
• Proton
• Neutron
• Quark

Which of the following is a negatively charged subatomic particle?

• Electron
• Proton
• Neutron
• Quark

Which of the following includes all of the subatomic particles found in the nucleus of an atom?

• Electrons and protons
• Electrons, protons, and neutrons
• Neutrons and electrons
• Protons and neutrons

Tags

NGSS.HS-PS1-8

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

• 15
• 31
• 16
• 47

An atom has an atomic number of 30 and a mass number of 65. How many neutrons are in the atom?

• 30
• 65
• 35
• 95

An atom has 5 protons and 7 neutrons. What is the mass number of the atom?

• 5
• 7
• 2
• 12

What kind of bond forms when atoms share electrons?

• Chemical bond
• Ionic bond
• Covalent bond
• Electron bond

Two atoms of the same element but with different mass numbers are called________.

• protons
• isotopes
• ions
• molecules

Isotopes are elements that are the same except for the amount of

• protons
• neutrons
• electrons
• atoms

An atom's mass number equals the number of...

• protons plus the number of electrons
• protons plus the number of neutrons
• protons
• neutrons