Biology 2.1 The Nature of Matter
Atoms of the same element that differ in the number of neutrons they contain are called ________________
Isotopes
What is a chemical compound?
A substance formed by the chemical combination of two or more elements in definite proportions.
Identify two ways in which carbon - 12, carbon - 13, and carbon - 14 are alike.
They all have 6 electrons and 6 protons in each carbon atom.
Identify two differences between carbon - 12 and carbon - 14.
They both have 6 electrons and 6 protons. The difference is that carbon - 12 has 6 neutrons while carbon - 14 has 8 neutrons.
A chemical element is a pure substance that consists entirely of one type of _______
Atom
What is the difference between an ionic bond and a covalent bond?
Covalent Bond - Electrons travel in the nuclei of both atoms Ionic Bond - One or more electrons are transferred from one atom to another.
An atom is made up of protons, neutrons, and ________________.
Electrons
What do the formulas for table salt, NaCl, and water, H2O, indicate about these compounds?
For NaCl it show the element ratio of 1:1 and H2O shows an element ratio of 2:1
How are chemical bonds important in metabolism?
Metabolism uses energy to break down chemical bonds, causing the broken bonds to release energy.
