Matter
An atom
What are most of the elements considered as
Most of the elements are metals
How is the periodic table organized
Periods
What group is extremely reactive
Alkali Metals ( group 1 )
Where are neutrons located
In the nucleus
What would you find in a periodic table
What is the most reactive element
Flourine
What is a physical change
Any change that alters the form or apperance of matter but does not make a new substance
What group is hard, shiny metals with extremely high melting and boiling points
Transition metals
Where are protons located
In the nucleus
How can the periodic table be divided?
Metals and non-metals
What elements is most attracted to a magnet
Iron
What are the three basic categories of elements
Metals, non-metals, and metalloids
What group is very reactive and reacts by losing 2 electrons
Alkaline earth metals
Where are electrons located
Outside of the nucleus
An element sinks in water and makes a ringing sound when it hits. What is it most likely to be?
A metal
What is water considered as
A compound
How many elements have been discovered
118
What group is silvery-white metals that trarnish when exposed to air
Lanthanide series
1668 C
What method is usually used to separate many different colored substances from each other?
Chromatography
Groups 14, 15, and 18 contain a mixture of metals, nonmetals, and metalloids. What are the nonmetals?
Carbon, Nitrogen, Phosphorus, Oxygen, Sulfur, and Selenium
What is a chemical change
A change in matter that transforms in into one or more new substance
What group is all reactive and most of them are man made
Actinide series
What is the boiling point of Platinum
3825 C