Atoms,Elements and Compounds
Atoms
What are the building blocks of life?
Macromolecules that are used in the human body
What are Carbohydrates, lipids, proteins, and nucleic acids?
Negatively charged particles that are located outside the nucleus and can be shared by two atoms
What are electrons?
Positively charged particles
What are protons?
A compound that contains carbon
What is an organic compound?
A bond that forms between charged ions
What is an ionic bond?
A charged atom that has lost or gained electrons
What is an ion?
The three most abundant elements found in living things (refer to bar graph)
What are Hydrogen, Carbon, and Oxygen?
A pure substance that cannot be broken down into other substances
What is an element?
Particles that have no charge
What is a neutron?
The role of enzymes in chemical reactions
What is to speed up the rate of chemical reactions.
Carbon-14
What is a radioactive isotope of carbon?
Covalent bond
What is a bond that forms when electrons are shared?
How long it takes for one half of a sample of carbon-14 to decay (according to the graph)
What is 5730 years?