Which of the following statements regarding subatomic particles is incorrect?

• Protons are positively charged particles and neutrons have no charge.
• The relative mass of the proton, electron and neutron the same.
• In a neutral atom the number of protons equals the number of electrons.
• Isotopes of an element have the same number of protons but a different number of neutrons.

Tags

NGSS.HS-PS1-8

Which subatomic particle is used to identify the atom, as it never changes?

• protons

• neutrons

• electrons

Tags

NGSS.MS-PS1-1

Which of the following particle pairs has approximately the same mass?

• protons and neutrons
• protons and electrons
• neutrons and electrons
• protons, neutrons and electrons

An atom is electrically neutral when

• protons and neutrons are the same
• protons and electrons are the same
• neutrons and electrons are the same
• neutrons balance the protons and electrons

Iron-60 (atomic number 26) is an isotope that is often used to study meteorites.  How many neutrons does iron-60 have?

• 26
• 60
• 34
• 86

Tags

NGSS.HS-PS1-8

How many protons does this isotope of titanium have? Hint titanium has an atomic number of 22.

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1

How many neutrons does this bromine atom have?

• 35

• 45

• 80

Tags

NGSS.MS-PS1-1

If the number of electrons in an atom changes you make a(n) __________________.

• ion
• isotope
• new element
• isomer

How many electrons are in an atom with atomic number 34 mass number of 74, and a charge of -2?

• 34

• 36

• 2

• 40

Tags

NGSS.MS-PS1-1

If an atom has more electrons than protons, it is a(n)

• Positive ion
• Negative ion
• Isotope
• Neutral atom

Tags

NGSS.MS-PS1-1