Miscellaneous
750 in scientific notation
7.5 * 102
what are the types of matter
substances and mixtures
What is an unevenly mixed matter called
heterogenous mixture
what is an isotope?
an atom where the neutrons have changed
where protons and neutrons are
the nucleus
three words you need to remember for hypothesis
if... then... because
what is an example of matter
anything with mass and takes up space
what is a substance made of only one kind of atom
an element
this kind of atom has a charge because of a gain or loss of electrons
an ion
what is the particle with a negative charge
an electron
what is the 5th step of the scientific method
analyze
what are the types of mixtures
heterogenous and homogenous
trail mix is an example of what kind of matter?
heterogenous mixture
An element has 9 protons, 6 neutrons, and 9 electrons- what type of element is it?
an isotope
What does the atomic number tell you
number of protons
4,760,000 in scientific notation
4.76 *106
What are the types of substances
elements and compounds
what is something made of two or more elements
a compound
What kind of atom has a +2 charge
a positive ion
what is an electron cloud
the region outside the nucleus that holds electrons
what are the three main types of science
life, earth, physcial
what is not an example of matter other than air
light, energy, heat, power, etc
What is two or more atoms that are chemically bonded
a molecule
an atom has 10 protons, an atomic mass of 21, and a charge of +1, how many electrons are there?
9
an element has 20 protons and an atomic mass of 42, how many neutrons are there?
22