Vocab
The study of the composition of matter and the changes that matter undergoes.
What is Chemistry?
What is an Atom
The smallest particle of an element that retains its identity in a chemical reaction
What are all the elements organized on
Periodic table
What are the three types of bonding
Ionic, metallic, covalent
What are the three types of radiation
Beta Alpha and gamma
A substance that contains two or more elements chemically combined in a fixed proportion.
What is a compound?
How can you observe atoms?
With instruments such as scanning electron microscopes
What are the three classifications of an element
Metal, metalloid, nonmetal
What kind of bond is it where the electrons are shared
Covalent
List in order strongest to weakest penetrating force of radiation waves
Gamma, Beta, alpha
A physical blend of two or more substances are not chemically combined.
What is a mixture?
What are the three subatomic particles?
Electron, neutrons, protons
What are the group 18 elements called
Noble gases
What makes up a salt. Also give an example
A nonmetal bonded with a metal for example table salt (NaCl)
What is fission
The splitting of a nucleus into smaller fragments accompanied by the release of neutrons and a large amount of energy
Matter that has a uniform and definite composition; either an element or compound also called pure substance
What is a substance?
What are the charges of the subatomic particles?
Electrons are negative
Protons are positive
Neutrons are neutral
What are the group 1 elements called
Alkali metal
What is the formula unit for an ionic compound
The lowest hole number ratio of ions in the compound in magnesium chloride the ratio of magnesium ions to chloride ions is 1:2 in the formula is MgCl2
What is fusion
Process of combining to produce a nucleus a greater mass
The process by which nuclei emit particles and rays
What is radioactivity?
What ideas are in Dalton’s atomic theory?
1. All elements are composed of tiny indivisible particles called atoms
2. Atoms of the same element are identical. The atoms of any one element are different from those of any other element
3. Atoms of different elements can physically mix together or can chemically combined in simple whole number ratios to form compounds
4. Chemical reactions occur when atoms are separated from each other joined or rearranged in a different combination. Atoms of one element, however, or never change into atoms of another element as a result of a chemical reaction
How are the elements arranged on the periodic table
By increasing atomic number
What element is this 1s22s22p63s1
Na or sodium
What kind of radiation do you see at an airport
Metal detectors, x-rays, and body scanners