science test vocab
Terms
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- family/group
- elements in the same vertical column on the periodic table. named by first element in group. all elements in a group share some characteristics
- metalloid
- an element that has the properties of both metals and nonmetals
- subatomic particles
- the parts that make up an atom. (protons, neutrons, electrons)
- malleable
- a material that can be pounded into shapes
- period
- a horizantal row of elements on the periodic table. elements in the same period have similar properties
- stable
- an atom that has almost the same number of protons and neutrons in its nucleus.
- unstable
- an atom in which the number of protons and neutrons are very different
- element
- a pure substance that cannot be broken down by chemical or physical means
- indirect evidence
- the strategy used to learn about things too small, large, or dangerous to be seen
- nonmetal
- an element that lacks most of the properties of a metal
- isotope
- the different versions of an element with different amounts of neutrons
- atom
- the smallest part of an element that still has the properties of that element
- atomic number
- the number of protons and electrons in an element. the periodic table is organized by atomic number.
- radioactive
- a substance that spontaneously emits radiation from an unstable nucleus.
- nucleus
- the central core of an atom containing protons and neutrons.
- quark
- the particles that make up protons and neutrons. 3 quarks make up 1 proton or neutron.
- neutron
- the neutral subatomic particle in the nucleus of an atom.
- proton
- the positively charged subatomic particle in the nucleus of an atom.
- metal
- a class of elements characterized by physical properties such as malleability, ductility, and shininess
- mass number
- the sum of the numbers of protons and neutrons in the nucleus of an element
- electron configuration
- the number of electrons in each energy level
- electron
- a negatively charged subatomic particle that circles the nucleus on energy levels.
- molecule
- a particle made of 2 or more atoms bonded together
- chemical symbol
- the 1 or 2 letter symbol representing an elements name on the periodic table
- valence electron
- the electrons used to combine with other elements. found on the outermost shell.
- naturally occuring
- an element that is found in nature, not man made
- ductile
- able to be pulled into a long wire
- energy level
- the different levels on which electrons orbit on
- atomic mass
- the weight/mass of an atom of a given element