Atomic Structure
The nucleus
This element is a very stable, non reactive gas at room temperature and has an atomic mass of approximately 20 amu.
Neon (Ne)
Iron (Fe)
Element
Which group of elements are shiny and good conductors of heat and electricity?
Metals
Rows of elements on the Periodic Table are called...
Periods
Neutral/no charge
This element is semi-metallic, a moderate conductor of electricity, not very shiny, and is located in group 13 of the periodic table.
Boron (B)
Water (H2O)
Compound
Which element group is Hydrogen part of?
Nonmetals
Electrons on the outermost orbital are called...
Valence electrons
What is another name for an atom's orbital?
Electron shell or energy level
This element is shiny, has a high melting point, and is the most reactive metal in the second period of the periodic table.
Lithium (Li)
Gasoline
Mixture
Which group of elements are very stable and nonreactive?
Noble gases
To find the number of __________ in an atom you must subtract the atomic number from the rounded atomic mass
Neutrons
How many neutrons does Hydrogen have?
Zero
Which is more reactive - Sodium (Na) or Carbon (C)?
Sulfuric Acid (H2SO4)
Compound
Where are metalloids found on the Periodic Table?
Bordering the staircase
This property is the tendency of one element to combine with another to form a new substance of different chemical composition
Reactivity
Why must a neutral atom always have an equal number of protons and electrons?
Protons (+) and electrons (-) have opposite charges so these charges have to cancel each other out to create a neutral (non-charged) atom
This element is brittle, not at all ductile, and is the most reactive nonmetal in period 2.
Fluorine (F)
Bronze
Mixture
Name one property of the nonmetals group.
Brittle, not shiny, not malleable or ductile, poor conductors
This word describes a mixture that is non-uniform, with different pieces or layers throughout
Heterogeneous mixture