IB Chem Unit 2 Flashcards

Atoms, Ions, and Periodic Table

What two laws did Dalton’s Theory of the Atom support?

Was Dalton’s Theory questioned? Why? Is Dalton’s theory considered to still hold true?

Who discovered the neutron?

How was the nucleus discovered?

What does the current theory of the atom look like?

What do we call atoms of an element that have different atomic masses?

What is the mass number of an iron atom that has 28 neutrons?

Where are metals located on the Periodic Table? Nonmetals? Metalloids?

What are two differences between metals and nonmetals?

What group of metals is the most reactive?

Which group on the Periodic Table is the least reactive?

What elements occur naturally as diatomic molecules?

What is the difference between a molecular formula and an empirical formula?

Is it necessary to balance charges when making an ionic compound? Why or why not?

Ionic compounds tend to form between what types of elements?

What charged ions do elements in Group 2 tend to form?

What is a cation? An anion?

Do metals tend to form cations or anions?

What charge do elements in Group 17 tend to form?

What is a polyatomic ion?

Is it necessary to balance charges when making a covalent compound? Why or why not?

What type of acid contains an oxygen atom?

What is a hydrate?

How were acids and bases defined at this point?

Covalent compounds tend to form between what types of elements?