unit of measure in which water boils at 212 degrees
What is Fahrenheit?
the number at the top left of each element
What are protons and electrons?
when two different elements come together to form a compound
What is synthesis?
the center of the atom that contains protons and neutrons
What is the nucleus?
a substance is said to be this if it emits waves of energy
What is radioactive?
based on freezing at 0 degrees, boiling at 100 degrees
What is Celsius?
the number at the bottom of each element
What is atomic mass?
What is decomposition?
negatively charged particles that travel in orbits around the nucleus
What is an electron?
the reason radioactive elements decay
What is to be stable?
no thermal energy or absolute zero is used in this measuring system
What is Kelvin?
a metal containing 29 protons
a bond between two elements in which the outer energy level is shared
What is covalent?
his model showed the electrons whipping around the nucleus at random
What is Rutherford's model of the atom?
the type of radioactive decay in which a proton is created from a neutron
What is beta?
this happens as kinetic energy increases
What is temperature increases?
an element with a mass of 40
What is Calcium?
in this type of bond an electron is shared and the charge changes, then opposite charges attract
What is ionic?
a version of an element that has a different number of electrons than normal, giving it a positive or negative charge
What is an ion?
a type of radioactive decay in which a proton and neutron are gained
What is alpha?
a noble gas that is also radioactive
What is Radon?
NaCl is bonded in this way
What is covalent?
the element that is used to detect the age of rocks
What is Carbon?