Question

study guide chapter 6 section 1: atoms, elements, and compounds
in your textbook, read about the structure of atoms.
label the diagram of an atom. use these choices: electron energy level neutron nucleus proton
1.
2.
in your textbook, read about elements, compounds, and chemical bonds.
if the statement is true, write true. if the statement is false, replace the italicized term or phrase to make it true.

1. on the periodic table, each element has a unique name and formula.
2. the periodic table is organized into horizontal rows, called periods, and vertical columns, called elements.
3. water is composed of hydrogen and oxygen.
4. atoms of the same element that have different numbers of neutrons are called isotopes.
5. the period of an element is the amount of time it takes for half of a radioactive isotope to decay.
6. a combination is a substance formed when two or more different elements combine.
7. the two main types of chemical bonds are covalent bonds and van der waals forces.

chapter 6 chemistry in unit 2

Explanation:

1 - 5: Label the atom diagram parts based on atomic - structure knowledge.
6: Each element has a unique name and symbol (not formula in the strict sense here), so false.
7: Vertical columns are groups, not elements, so false.
8: Water has the formula H₂O, composed of hydrogen and oxygen, so true.
9: Definition of isotopes is correct, so true.
10: The half - life is the time for half of a radioactive isotope to decay, not period, so false.
11: A compound is formed when different elements combine, not a combination, so false.
12: Main chemical bonds are covalent and ionic (not van der Waals forces which are intermolecular), so false.

Answer:

1. electron
2. energy level
3. neutron
4. nucleus
5. proton
6. false, symbol
7. false, groups
8. true
9. true
10. false, half - life
11. false, compound
12. false, ionic bonds