Question

reinforcement: the chemistry of life

1. neutral subatomic particles found in the nucleus of an atom:
2. positively charged subatomic particles that make up atoms:
3. negatively charged subatomic particles that make up atoms:
4. type of bond that involves transferring electrons:
5. type of bond that involves sharing electrons:
6. substances that consist of only one type of atom:
7. substances that consist of two or more elements:
8. weak interactions responsible for the \sticky feet\ of geckos: forces.
9. lactase is an that breaks down milk sugar.
10. molecules that make up living things and contain carbon are called molecules.
11. large molecules made of many small subunits:
12. property of water that causes water to stick to other water molecules:
13. property of water that causes water to stick to other things:
14. compounds that consist of chains of carbon:
15. a large amount of energy is needed to change water temperature; it has a high heat
16. shows elements arranged in order by atomic number: the table
17. refers to molecules that have a partial negative and positive charge.
18. formed between water molecules; type of weak bond: bond
19. the center of an atom; contains protons and neutrons:
20. changing the temperature of water from cold to warm requires:
21. sketch a molecule of water and indicate which areas are positive and which areas are negative
22. explain how a water strider stays on the surface of water.

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Explanation:

1. Neutrons are neutral subatomic particles in the nucleus.
2. Protons are positively - charged subatomic particles in atoms.
3. Electrons are negatively - charged subatomic particles in atoms.
4. Ionic bonds involve electron transfer.
5. Covalent bonds involve electron sharing.
6. Elements consist of one type of atom.
7. Compounds consist of two or more elements.
8. Van der Waals forces are responsible for gecko's sticky feet.
9. Lactase is an enzyme that breaks down milk sugar.
10. Organic molecules make up living things and contain carbon.
11. Macromolecules are large molecules made of small subunits.
12. Cohesion is the property of water to stick to itself.
13. Adhesion is the property of water to stick to other things.
14. Organic compounds consist of carbon chains.
15. Water has a high heat capacity, requiring much energy to change temperature.
16. The periodic table shows elements arranged by atomic number.
17. Polarity refers to molecules with partial positive and negative charges.
18. Hydrogen bonds are formed between water molecules.
19. The nucleus is the center of an atom containing protons and neutrons.
20. Changing water temperature requires energy.
21. In a water molecule, the oxygen end is partially negative and the hydrogen ends are partially positive.
22. A water strider stays on water surface due to water's surface tension caused by cohesion.

Answer:

1. Neutrons
2. Protons
3. Electrons
4. Ionic
5. Covalent
6. Elements
7. Compounds
8. Van der Waals
9. Enzyme
10. Organic
11. Macromolecules
12. Cohesion
13. Adhesion
14. Organic
15. Capacity
16. Periodic
17. Polarity
18. Hydrogen
19. Nucleus
20. Energy
21. Oxygen end is negative, hydrogen ends are positive (Sketch required for full - answer)
22. Due to water's surface tension caused by cohesion.