Acids & Bases
Lemons, vinegar, and tomato juice are examples of what?
Acids
The sum of protons and neutrons equals what?
Atomic mass
Who developed a simplified model of the atom?
Niels Bohr
Why do atoms usually have no charge?
Protons equal electrons
Attraction between charged ions forms what?
Ionic bond
A slippery feeling is a property of what?
Bases
In a normal atom, electrons equal what particle?
Protons
Who developed the periodic table?
Dmitri Mendeleev
What do elements in the same group have in common?
Same number of electrons in the outer shell
When atoms share electrons, the bond is called what?
Covalent bond
What can you use to determine the concentration of acids or bases in a solution?
The pH scale
The atomic number tells the number of what?
Protons
Who if the "Father of Modern Chemistry?"
Robert Boyle
Which group of elements is considered stable and why?
The noble gases because they have a full outer shell of electrons
What type of reaction breaks compounds apart?
Decomposition reaction
Baking soda, soap, and bleach are examples of what?
Bases
H₂CO₃ contains how many carbon atoms?
one
Which scientist is associated with atomic theory and gases?
Robert Boyle
What does a chemical reaction between an acid and a base produce?
salt and water
What type of reaction builds new compounds?
Synthesis reaction
What could help relieve a fire ant's acidic bite, and why?
A paste made of baking soda, toothpaste, or an antacid paste; because a base neutralizes the acid
Why is atomic mass an approximation?
Neutrons can vary (isotopes)
Who studied atoms using the gold foil experiment?
Ernest Rutherford
How is the hydrangea like litmus paper?
An acidic soil will produce pink flowers just as litmus paper turns red in an acid. A basic soil will turn the blossoms blue just as litmus paper turns blue in a base.
Explain why all compounds are molecules but not all molecules are compounds.
There are different types of molecules. Some molecules are produced when atoms of the same element combine. Others are produced when atoms of two or more different elements combine through a chemical reaction. Compounds are a kind of molecule produced as a result of a chemical change (chemical reaction).