Chemistry Is Life Flashcards
(50 cards)
What is a subatomic particle that circles an atom’s nucleus?
Electron
What is the smallest particle of an element called?
Atom
What is a charged atom or molecule?
Ion
What is caused by pollutants that combine with water in the air?
Acid precipitation
What is anything that occupies space and has mass?
Matter
What do two or more atoms held together by covalent bonds form?
Molecules
Where in an atom are the neutrons and protons found?
Nucleus
The cohesion of water molecules is responsible for what?
Surface tension
What are variant forms of an element with different numbers of neutrons called?
Isotope
What is the tendency of water molecules to stick together?
Cohesion
What is a subatomic particle with no electrical charge?
Neutron
What measures the intensity of heat?
Temperature
Electrons are shared unequally in a ——–covalent bond?
Polar
How many naturally occurring elements are there?
92
What contains two or more elements in a fixed ratio?
Compound
What are weak bonds between water molecules called?
Hydrogen
What donates H positive ions to solutions?
Acid
What is formed when two atoms share electrons?
Covalent bonds
What is a positively charged particle from the nucleus of an atom?
Proton
What is the dissolving agent in a solution called?
solvent
What is a liquid containing a uniform mixture of substances called?
Solution
What forms went to ions of opposite charges attract each other?
Ionic bond
What is the substance dissolved in a solution?
Solute
What excepts H positive ions and removes them from solution?
Base