Periodic Table
In what direction do the elements in one period increase in atomic number?
Left to Right
What subatomic particles can be found in the nucleus of an atom?
Protons and Neutrons.
Based on what we know about the structure of the atom, which of the following subatomic particles are found outside the nucleus?
Electrons.
A small particle that is the building blocks of matter?
Atom
Rows in a period table. The periods numbered 1-7.
Periods.
True or false. Non-metals have better electrical conductivity than metals.
False.
True or False: The atom is made of mostly empty space?
True
The region surrounding surrounding an atom?
Electron Cloud.
The small pieces of an atom (protons, electrons, and neutrons)
Subatomic Particles
The letter(s) that represent the name of an element on The Periodic Table of Elements?
Chemical Symbol
In the periodic table, how are elements in the same group (family) related to each other?
They have similar properties.
Most of the mass of an atom is found where?
The nucleus.
True or False. Atoms are always moving?
True.
A positively charged particle in the nucleus of an atom?
Proton
Located on the left side and in the middle of the periodic table. All metals are shiny and conduct thermal energy and electricity.
Metals.
An element is found to be a solid that is silver in color and an excellent conductor of electricity. This element is important to modern life because it helps make steel needed for construction. What classification does this element belong to?
Metals.
The total mass of particles of matter in an atom, i.e. the masses of proton, neutrons, and electrons in an atom added together?
Atomic Mass
What subatomic particle is responsible for determining the identity of an element?
Proton.
A neutral particle in the nucleus of an atom?
Neutron
Columns in the periodic table of elements and have similar chemical properties and react with other elements in similar ways. The groups are numbered 1-18.
Groups.
Located between the nonmetals and metals on the periodic table. Has properties of both metals and nonmetals.
Metalloids.
If the atomic number for oxygen is 8, how many protons are in the nucleus of each of its atoms?
8.
True or False. Matter is made up of atoms?
True
The number of protons in an atom of an element?
Atomic Number
A theory of the nature of matter, all material substances are composed of minute particles or atoms of a comparatively small number of kinds and all atoms of the same kind are uniform in size, weight, and other properties?
Atomic Theory