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In Ernest Rutherford's Gold foil experiment, most positively charged particles passed through the foil, but a few particles were deflected strongly. This result caused Rutherford to infer...
You can predict an element's properties by its...
What is location on the periodic table?
The ... of an element is based on the number of protons in its nucleus.
What is Atomic Number?
Three properties of metals are...
What are malleable, ductile, and can carry an electric current?
Two ways protons and neutrons are similar.
Relative Mass and Located in the Nucleus
... Created the first periodic table by arranging elements in order of increasing atomic mass.
Who is Mendeleev?
Where are nonmetals found in the periodic table?
What is on the right side?
Atoms with the same number of protons and different neutrons are...
What are isotopes?
The two most common ALKALINE METALS.
The atomic nuclei of unstable isotopes release fast-moving particles and energy in this process.
What is Radioactive Decay?
The series of electrons orbit, like planets around the sun or an onion, in this scientist's model.
What is Bohr's Model?
How is the periodic table organized?
What is atomic number?
Elements that easily transmit electricity and heat display this property.
The halogen family is in what group?
What is Group 17?
What particle is given off during the change from Radium (Ra; 88) to Radon (Rn; 86)?
Ra Mass Number : 226
Rn Mass Number : 222
An alpha particle. The atomic number decreases by 2 and the mass number decreases by 4. This is the way a nucleus changes when an alpha particle is given off.
This woman scientist named the emission of radiation by an unstable atomic nucleus radiation.
Who is Marie Curie?
Each element is given a specific chemical symbol that usually consists of ...
What is 1 to 2 letters?
... consists of particles that are identical to electrons
What is Beta Radiation?
Elements that do not ordinarily form compounds.
What are noble gases?
What is the difference in Uranium (U; 92) and Lead (Pb; 82)
What is 10?
Measurements of ... make radioactive isotopes useful for determining the ages of rocks and fossils.
What is half-life?
Why would you use iron and other transition metals in construction, instead of alkali metals?
When people build a structure, they want it to be stable, to support great weight, and to last for a long time. Iron and certain other transition metals have these characteristics. Alkali metals, on the other hand, are soft and highly reactive, so they are not useful for construction.
The horizontal rows in the periodic table.
What are Groups?
Column of elements in the periodic table is called...
What is Family?
Are radioactive isotopes hazardous or useful?
Both