Chemistry test
Terms
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- too few neutrons
- An element can also be radioactive when there are...
- alpha, beta, gamma
- three kinds of decay
- stable nucleus
- binding energy of most nuclei is strong enough to hold the nucleus together means that
- non-metals
- on the right side of the zig-zag line there are the _____.
- metallic bonds
- metal plus a metal (sharing of many valence electrons)
- occurs in the form of heat and light that carry small amounts of energy
- In what form does radiation occur?
- the process by which the nucleus changes
- what is radioactive decay
- alpha decay
- stops at stable elements
- element
- purist form
- quarks
- have never been seen or observed
- isotopes
- atoms of the same element that differ in the number of neutrons they contain
- half-life
- rate of decay for radioactive isotopes
- gamma decay
- occur along with beta and alpha particles
- families
- veritcal rows are called ____.
- alpha decay
- can be harmful if taken into the human body
- covalent bonds
- non-metal plus a non-metal
- synthetic
- all elements above 92 are
- beta decay
- have more energy than alpha particles
- synthesis
- A+B-yields-AB
- naturally not chemically
- elements can only turn into another element...
- down quark
- charge of -1/3
- up, down, beauty, truth, charmed, strangeness
- six known quarks
- C+273=K
- celcius to kelvin
- neutron
- made up of 1 up and 2 down
- radioactive elements
- what kind of elemetns release energy spontaneously?
- family
- elements are grouped accoding to their ____.
- binding energy
- the force that holds the nucleus together (protons and neutrons) also known as
- radioactive
- most elements in nature are not
- ion
- atom that has gained or lost electrons
- single displacement
- A+BC-yields-AC+B: two metals trade places
- alpha and beta decay
- both of the decays change the number of protons in a nucleus enabling one element to change into another
- F-32=Ans./1.8=Ans.+273=K
- farenhiet to kelvin
- alpha decay
- not dangerous to living things
- gamma decay
- only energy is released
- K-273=C
- kelvin to celcius
- proton
- made up of 2 up and 1 down
- double displacement
- AB+CD-yields-CB+AD: postive ion of one compound replaces the positive ion of the other to form two new compounds
- unstable nucleus
- doesn't have strong enough binding energy to hold it together making it radioactive
- protons and electrons
- elements have the same number of ____ and _____.
- alpha decay
- package of two protons and two neutronsis released: weakest form of decay
- decomposition
- AB-yields-A+B
- element
- anything made from matter
- alpha decay
- looses energy quickly
- K-273= Ans. * 1.8=Ans. +32= F
- kelvin to farenhiet
- radiation
- heat and light energy
- F-32=Ans./1.8=C
- farenhiet to celcius
- beta decay
- when neutron emits this particle the neutron becomes a proton
- gamma decay
- very energetic
- quark
- make up all known particles in the nucleus of an atome
- the nucleus
- Where does radiation come from?
- beta decay
- travels less that one meter in air
- C*1.8=Ans.+32=F
- celcius to farenhiet
- the nucleus
- where do changes take place
- beta decay
- negatively charged paricles from neutrons are given off
- up quark
- charge of +2/3
- metals and non-metals
- the two types of elements on the periodic table are____ and _____.
- beta decay
- can be stopped by metal foil
- ionic bonds
- bonds formed between a metal and non-metal
- nuclear particles
- thought to be a combination of three quarks
- periods
- horizontal rows on the table are called ____.
- gamma decay
- penetrate deep into the human body and damage vital cells high dose can cause radiation sickness and be life threatening
- the process of one element turning into another
- What process is not chemical?
- half-life
- the amount of time it takes for half of the atoms to decay
- alpha decay
- does not contain much energy
- metals
- on the left side of the zig-zag line on the table there are the ___.
- diatomic atoms
- form in pairs:Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine
- unstable element
- when the number of neutrons greatly outnumbers the number of protons that means what?