Chp. 3.2 Vocabulary: Atoms, Bonding, and the Periodic Table

the electrons in the outermost shell (main energy level) of an atom; these are the electrons involved i forming bonds

• valence electrons
• ionization electrons
• core electrons
• nuclear electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

the force that holds two atoms together

• magnetic force
• gravitational force
• chemical bond
• electrical force

a representation of the number of valence electrons in an atom, using dots placed around the symbol of an element

• Electron dot structure
• Lewis structure
• Bohr model
• Valence shell electron pair repulsion (VSEPR) theory

Tags

NGSS.HS-PS1-1

Proton - positive

Neutron - neutral

Electron - negative

• particle charges

• methane

• elements

• nonmetal

Tags

NGSS.MS-PS1-1

a table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together

• Element Chart
• Atomic Table
• Periodic Table
• Chemical Table

the elements in Group 8A of the periodic table

• helium, neon, argon, krypton, xenon, radon

  noble gases

• lithium, sodium, potassium, rubidium, cesium, francium

  noble gases

• beryllium, magnesium, calcium, strontium, barium, radium

  noble gases

• hydrogen, oxygen, nitrogen, carbon, sulfur, phosphorus

  noble gases

elements that are good conductors of heat and electric current

• liquids
• insulators
• metals
• nonmetals

an element or substance that is not a metal. not a good conductor of heat or electricity

• insulator
• conductor
• nonmetal
• metal

elements that have properties of both metals and nonmetals

• metals
• metalloids
• transition metals
• nonmetals

element in group 1 because it has one valence electron, but is considered to be a nonmetal

• oxygen
• hydrogen
• lithium
• helium