Chemistry Semester 2 EOC Quiz

What charge does an atom become if it gains electrons?

• Positive

• Negative

• Neutral

• No change

What is a cation and how does it form?

• A negatively charged ion formed by gaining electrons

• A positively charged ion formed by losing electrons

• A neutral atom formed by sharing electrons

• A positively charged ion formed by gaining electrons

What is an anion and how does it form?

• A positively charged ion formed by losing electrons

• A negatively charged ion formed by gaining electrons

• A neutral atom formed by sharing electrons

• A negatively charged ion formed by losing electrons

Using the periodic table the formulas of binary ionic compounds are generally written with the cation (metals) on the ________ and the anion (non-metals) on the ________.

• left, right

• right, left

• top, bottom

• bottom, top

Magnesium bromide is an ionic compound with the formula MgBr₂. What does the “2” tell you?

• There are two magnesium atoms

• There are two bromine atoms

• There are two molecules of MgBr₂

• There are two ions in the compound

Lewis structures are drawn to illustrate how each atom in the molecule satisfies what rule?

• Octet rule

• Duet rule

• Triple bond rule

• Valence rule

Temperature measures the average ____________ energy of molecules.

• Potential

• Kinetic

• Thermal

• Chemical

What is the pH of water?

• 0

• 7

• 14

• 4

During an experiment, you test the pH of a substance and find that it is a pH of 4. Is this substance an acid or a base?

• Acid

• Base

• Neutral

• Cannot be determined

What ion is common in all acidic solutions?

• OH⁻

• H⁺

• Na⁺

• Cl⁻