Periodic Table
An element in the same column (group) has what in common?
Similar properties / same number of electrons in their outer shell
Is lemon juice an acid or base?
Acid
What is the formula for Carbon Dioxide?
CO2
The state of matter in which atoms have the highest kinetic energy is....
gas
Is air an element, compound, or mixture?
Mixture
If an element has atomic number 12, how many protons does it have?
12
What pH number is neutral?
7
How many atoms are in NaHCO3?
6
Is color a physical or chemical property?
Physical
Which of these is NOT like the others?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Neon
Carbon Dioxide-- it's a compound and not an element
An element has:
Is in Group 5
Is a transition metal
What happens when an acid with a pH of 6 and base with a pH of 8 mix?
Is O₂ a molecule, compound, or both?
Molecule (only one type of atom)
Dissolving salt in water — physical or chemical change?
What number determines what the element is?
An element has:
18 neutrons
Is in Group 17
Is very reactive
Chlorine
If I have a pH of 2, is that dangerous to humans?
Not neccesarily!
What type of elements make up sodium chloride? I'm going to be picky!
Sodium and Chlorine
A mystery powder:
Is white
Dissolves in water
Fizzes when mixed with vinegar
Which properties are physical and which are chemical?
→ White (physical)
→ Dissolves (physical)
→ Fizzes with vinegar (chemical)
Which is more reactive:
A) A noble gas
B) An element in Group 1
C) An alkaline metal
D) A halogen
D) A halogen
Why are noble gases not very reactive?
Their outer most energy shells are full
Acids have a lot of this type of ion in them.
True or False: All molecules are compounds, but not all compounds are molecules
False
List TWO signs that a chemical change has happened. You may not use "formed a new substance" or "irreversible"
Color change
Gas/bubbles form
Temperature change
Light produced
New smell
Water is made of hydrogen and oxygen.
Is water an element or compound?
compound