Science / Elements and the Periodic Table

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Can you name the Elements and the Periodic Table Key Terms?

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DefinitionTerm
Sum of the protons and neutrons of an atom
The ease and speed with which an element reacts with other substances
Rows in the periodic table
True or false: The number of protons always stays the same as the number of electrons in an atom.
Scientist who thought that the atom was just a round ball that couldn't be broken into smaller pieces
Region where protons and neutrons are found
Atoms with the same number of protons and different numbers of neutrons
The smallest particle that can still be considered an element
Scientist who discovered electrons
Particle in the atom with the smallest mass.
Unit used to measure the mass of an atom (abbreviation)
A material that can be hammered or rolled into flat sheets or other shapes is said to be _____
Columns in the periodic table
Scientist who thought that electrons were found in specific orbits around the nucleus
The number of protons in the nucleus of an atom
True or false: Most metals are not good conductors of heat and electricity.
Substance that can conduct electric current under some conditions but not under other conditions
The deterioration of a metal due to a chemical reaction in the environment
The modern periodic table is arranged in order of increasing ______.
DefinitionTerm
These have some properties of metals and some properties of nonmetals
Describes how shiny a metal is
Name of the modern model of the atom
Particle in the atom with no charge
Positively charged particles in an atom
Negatively charged particles in an atom
The most reactive type of metal
Number of electrons that can be held in the second shell (spell out number
Particles that move around in the cloud-like region of the atom
Every atom of an element has the same number of _____.
Number of electrons that can be held in the first shell (spell out number)
Scientist who discovered that the atom had a positively charged nucleus
True or false: Most nonmetals are poor conductors of electric current and heat.
A material that can be pulled out into long wires is said to be _____.
Average mass of all the isotopes of an element
Scientist who developed the first periodic table of elements (last name only)
Region in the center of an atom
True or false: Most metals are solid at room temperature.

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