Chapter 2 Flashcards
Element
A substance that cannot be broken down to other substances by chemical reactions
Matter
Anything that takes up space and has mass.
Compound
A substance consisting of two or more different elements combined in a fixed ratio.
Isotopes
Have more neutrons than other atoms of the same element.
Radioactive isotope
The nucleus decays spontaneously, giving ff particles and energy.
Energy
The capacity to cause change.
Potential energy
The energy that matter possesses because of its location or structure.
Covalent bond
The sharing of a pair of valence electrons by two atoms.
Electronegativity
The attraction of a particular atom for the electrons of a covalent bond.
Cation
A positively charged ion. Less electrons than protons.
Anion
A negatively charged ion. More electrons than protons.
Chemical reactions
The making and breaking of chemical bonds, leading to changes in the composition of matter.
