Fichas
Science 2
Fichas del conjunto (28)
- 1How many atoms are shared in a triple bond?3 atoms
- 2Neutrons have a ___ chargeNeutral
- 3What is the charge of protons?Positive
- 4What subatomic particle has a negative charge?Electron
- 5What elements have these symbols: O Pb C FeOxygen
Lead
Carbon
Iron - 6What group exists in different forms of allotropes?Group 14
- 7What is a valence electron?An electron on the outer shell of an atom
- 8The number of protons in an atom is known as ____Atomic number - the smallest of two numbers shown in the periodic table
- 9What is the equation for mass number?# of protons + # of neutrons
- 10What is an isotope?What atoms of the same element that have a different # of neutrons
- 11What are the rules for arranging electrons?1. Electrons always occupy shells around the nucleus
2. The shells closest to the nucleus are always filled first
3. Each shell can only contain a certain # of electrons (2, 8, 8, 2) - 12T or F: The shells of noble gases are full (happy)T
- 13What is the overall charge of an atom?Neutral
- 14T or F: if an atom gives away an electron, it will become negativeF
- 15Atoms that have either extra electrons added or removed are called what?Ions
- 16What are atoms called once they lose one or more electrons?Positive ions (cations - because they're pussy-tive!)
- 17What are the atoms that have gained one or more electrons called?Negative ions (anions)
- 18What are the properties of halogens?very reactive non-metals
toxic/harmful
used to clean wounds (iodine)
harmful to bacteria
founds as compounds with metals
have 7 electrons (not happy)
exist in diatomic molecules (2) - 19What are the properties of noble gases?colourless at room temp
very unreactive
originally called "inert gases"
have 3 electrons (not happy)
very stable
monatomic (1) - 20Where are the transition metals located?Between group 3 & 12
- 21What is indirect evidence?Evidence gathered on a theory for an 'invisible', undiscovered particle
- 22What is the difference between group and period in the periodic table?Group = vertical
Period = horizontal
- 23What is a triad?A group of 3 elements that react in the same way to things
- 24What was the original name for Germanium?Eka-silicon
- 25Why do noble gases tend to not form bonds?They have a full outer shell (happy)
- 26How are lattices formedWhen ions of an opposite charge build up a three-dimensional structure
- 27What best identifies the following terms: Metallic Ionic CovalentElectron sea
Charged atoms
Shared electrons - 28What are allotropes?Each of two or more different physical forms in which an element can exist (e.g. charcoal and diamond are allotropes of carbon)
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- Fichas sobre Science 2, creado por emzyrox2011 el 24/03/2015.
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- emzyrox2011
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