Atoms
What is the center of the atom called?
The Nucleus
How are elements arranged on the periodic table?
By atomic number
What is the symbol for gold?
Au
What is a chemical reaction?
When substances change into new substances
What is the pH of a neutral substance?
7
What charge does a proton have?
Positive
What group are noble gases?
Group 18
What element has atomic number 1?
Hydrogen
What are reactants?
Starting substances
Is vinegar an acid or base?
Acid
What particle has no charge?
Neutron
How many valence electrons do Group 1 elements have?
1
What element is a noble gas?
Neon (or any noble gas)
What are products?
Substances formed
Is soap an acid or base?
Base
Where are electrons found?
Electron cloud
What family is very reactive and found in Group 17?
Halogens
What element do we breathe to survive?
Oxygen
What reaction releases energy?
Exothermic
What pH range is acidic?
Below 7
What are valence electrons?
Electrons in the outer shell
What side of the periodic table are metals?
Left side
What element is liquid at room temperature?
Mercury
What reaction absorbs energy?
Endothermic
Above 7