Basic Elements
What is the lightest element on the periodic table?
Hydrogen
What is a vertical column on the periodic table called?
Group
What is a horizontal row called?
Period
What is the charge of a proton?
Positive
What is the symbol for Hydrogen?
H
What element has the symbol O?
Oxygen
What group contains very unreactive elements?
Noble gases
Does atomic size increase or decrease across a period?
Decrease
What is the charge of a neutron?
Neutral
What is the symbol for Sodium?
Na
What element do humans need to breathe?
Oxygen
What group contains elements that react strongly with water?
Alkali metals
What happens to atomic size down a group?
Increases
What is the charge of an electron?
Negative
What element has the symbol Fe?
Iron
What element is a metal and is liquid at room temperature?
Mercury
What do elements in the same group have in common?
Same number of valence electrons
What happens to reactivity of alkali metals down the group?
Increases
What determines the identity of an element?
Number of protons
What element has the symbol K?
Potassium
What element is the most abundant in the universe?
Hydrogen
What group is oxygen found in?
Group 16
Which element is in Period 3, Group 17?
Chlorine
What property measures how strongly atoms attract electrons?
Electronegativity
What element has the symbol Pb?
Lead