Subatomic Particles
This particle is found in clouds around the nucleus
What is an electron?
The majority of the elements on the periodic table are classified as this
What are metals
This particle was discovered by J.J. Thomson
What is an electron
What is 79
What is chlorine
This particle has a no charge (neutral) and contributes to the mass of an atom
What is a neutron
This element has an atomic number of 63
The proton was discovered by who in 1919 by doing gold foil experiments
How many protons does Holmium have?
What is 67
What is group 2A, alkaline earth metals, or Be, Mg, Sr, Ba, Ra
What are protons, electrons, and neutrons
This is number on the periodic table is equal to the number of protons and neutrons
What is mass number
This scientist did oil-drop experiments to determine the charge and mass of an electron
Who is Robert Millikan
When atoms of the same element contain different number of neutrons
What is isotope
The elements from 89 - 103 are referred to as _______
What are actinides
A neutral atom has the same number of ______ and _______
What are protons and electrons?
Give an example of a metalloid
What is boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po), and Astatine (At)
This scientist discovered that electrons are in discrete energy levels
Who is Niels Bohr
This element has a mass of 1.008 amu. How many neutrons does it have?
What is zero
Similar chemical reactivity/properties determine which _____ an element is located
What is group or family
These units used to represent the mass of a proton, neutron, and electron
What is atomic mass units
Another name for the elements in Group 16
What is Chalogens
This subatomic particle was discovered by James Chadwick
What is a neutron
This equation is used to calculate
∑[(fractional isotope abundance) x (isotope mass)] = __________
What is average mass or atomic weight
As you go down a period, an atom gains _______
What is energy levels or electron shell