Live 4.3 Nuclear Symbols (includes Ions)

Which of the following determines the type of element that an atom makes?

• The size of the nucleus.
• The number of protons.
• How much the atom weighs.
• The number of neutrons.

Tags

NGSS.HS-PS1-1

A proton is a _____ charged particle.

• Negatively
• Positively

An electron is a _____ charged particle.

• Positively
• Negatively

Tags

NGSS.MS-PS2-3

How many electrons are in ⁷⁴₃₄Se^-2 ?

• 34
• 36
• 2
• 40

What is an atomic number?

• The sum of protons and neutrons in an atom.
• The sum of protons and electrons in an atom.
• The number of protons in an atom of a specific element.
• The number of neutrons in a specific element.

Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.

• neutrons ; atomic numbers

• protons ; atomic numbers

• electrons ; mass numbers

• neutrons ; mass number

The photo above shows the isotopic notation for which isotope?

• Carbon 12

• Carbon 13

• Carbon 14

• Carbon 15

Tags

NGSS.HS-PS1-8

An atom that has become charged by gaining or losing electrons.

• Ion
• Isotope
• Electron
• Valence Electron

Tags

NGSS.MS-PS2-3

How many neutrons does the isotope below have?     ⁸⁹ ₃₆Kr

• 53
• 36
• 89
• 125

Tags

NGSS.HS-PS1-8

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