Elements Mixtureas And Compounds and the atom Flashcards
Where can you fin d the elements listed
The periodic table
What is an element
An element is made up of only one type of atom
What is a compound
A compound is made up of two or more different types of atoms chemically combined
What is a molecule
A molecule is the smallest amount of an element or compound that still has the chemical properties of that element or compound
What are the differences between mixtures and compounds
A mixture consist of two or more substances but a compound consist of one substance
The proportion of the substances in the mixture doesn’t matter while it has a fixed proportion in the compound
The properties are the same. As the substance used buts in a compound the properties are different
Mixtures are easy to seperate but compounds are very difficult to seperate
What is an atom
An atom is the smallest part of an element that still remains the properties if that element
What are atoms made up of
Protons neutrons and electrons
Where are protons and neutrons found
The nucleus
Where are electrons found
On shells orbiting the nucleus
What are the charges of all the parts of an atom
Protons positive charge +1
Neutron no charge
Electrons negative charge -1
What is the atomic no.
No. Of protons which is the same as number of electrons
What is the mass numbe
No. Of protons and no. Of neutrons
What us the electron configuration
Shows the no. Of electrons on each shell of the atom
What is the two parts of the periodic table
Metals and non metals w
What are the rows on the periodic table calked
Periods
What are the r
Columns on the periodic table called
Groups. They all have the same no. Of electrons on their outer shells
All the elects in a particular group behave in a similar manner
What is the first group
Alkali metals
What elements are in the alkali metals group
Lithium sodium and potassium
Facts about group 1
Soft metals
All stored in oils
Very reactive
What is group 2 called
The alkaline earth metals
What elements are in group 2.
Calcium and magnesium
What is the 7th group called
Halogens
What elements are in group 7
Fluorine and chlorine
What is group 8 called
The noble gases
What are the events in the noble gases
Helium a d neon argon
All the elements in this group have a full outer shell and and are chemically un reactive
