1
Which subatomic particle determines an element's chemical properties?
Electrons
What determines an atom's atomic number?
Number of protons
How many valence electrons do elements in Group 18 typically have?
8
A neutral atom has:
Equal protons and electrons
If an element is located in Period 3 and Group 17, what can you predict about its properties?
It will be a highly reactive non-metal
What represents the number of valence electrons in an atom's outermost shell?
Group number
Which describes an acid in chemistry?
Accepts hydrogen ions
What type of bond forms between non-metal atoms?
Covalent bond
What determines an element's chemical behavior?
Electron configuration
An element is located in the far left column of the periodic table. What characteristic does this element most likely possess?
High reactivity
In an ionic bond, electrons are typically:
Transferred completely
An atom with 17 protons belongs to which element?
Chlorine
An acid will:
Decrease pH
Which group contains elements that are typically gases at room temperature?
Noble gases
Compare and contrast ionic and covalent bonding.
Ionic bonds: metals and nonmetals
Covalent bonds: two nonmetals
Which element family is most reactive with other elements?
Alkali metals
What represents the total number of protons and neutrons in an atom?
Mass number
Which particle has a negative charge?
Electron
Explain how the number of valence electrons determines an element's reactivity and bonding behavior.
Valence electrons determine the reactivity because elements with low valence electrons are more reactive because they want to bond with something to be happy. Elements with a full amount of valence electrons are already happy and not reactive.
How many elements are on the periodic table?
118
DOUBLE POINTS
A covalent bond is formed when:
Electrons are shared between atoms
Which statement best describes a molecule?
Two or more atoms chemically bonded
Elements in the same period have:
Same number of electron shells
How many shells does Lithium have? How many valence electrons does Lithium have?
2 shells
1 valence electron
TRIPLE POINTS
Which region of the periodic table contains elements that are most likely to form covalent bonds?
Right side non-metals (Groups 15-17)