Unit 1 Review

Front

How are isotopes different from one another?

Back

They have different numbers of neutrons

Front

What is the reaction between an acid and a base called?

Back

neutralization

Front

Gold has an atomic number of 79 and an atomic mass of 197. How many protons, neutrons, and electrons are in the atom?

Back

79 protons, 79 electrons, 118 neutrons

Front

What is the group of elements called that includes argon, neon, and helium?

Back

the noble gases

Front

What is the charge of the sodium ion after it bonds with chlorine?

Back

positive

Front

What substance reacts with metals to produce hydrogen gas, tastes sour, and turns blue litmus paper red?

Back

an acid

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds form when a metal combines with a nonmetal, but covalent bonds form between nonmetals.

Front

How does aluminum's reactivity compare to other metals with one or two valence electrons?

Back

Aluminum has a lower reactivity than the other metals

Front

What is the sunflower an example of when it seems to grow out of nothing, contrary to the Law of Conservation of Mass?

Back

an open system

Front

Which of the following is not a benefit of synthetic foods?

• They take less time to produce
• They are less expensive
• They make food last longer
• They have no known health risks

Back

They have no known health risks