A) 1 B) 5 C) 37 D) 2
A) NBr B) NCl2 C) NF3 D) NI4
A) period 2, group 2 B) 12 C) 2,8,2 D) 10,2
A) proton B) neutron C) atom D) electron
A) All atoms in group 18 have 18 electrons B) All atoms have a full outer electron shell or 8 electrons in the outer shell C) Group 18 is known as the noble gases D) atoms in group 18 tend to be monatomic
A) B (period 2) B) Mg (period 3) C) Sr (period 5) D) Ca (period 4)
A) Sulfur S (period 3, group 16) B) Osmium (Os) because its symbol also starts with O C) Nitrogen N (period 2, group 15) D) Neon Ne (period 2, group 18)
A) So B) S C) Na D) Sm
A) Metals B) Noble Gases C) Non-metals D) Halogens
A) a halogen B) an alkali earth metal C) an alkali metal D) an inert gas
A) atoms of the same type B) non-metals only C) different metals D) a metal and a non-metal
A) atoms collect free electrons and use them as glue B) one atom steals the electron/s from another C) electron/s are shared between two atoms so both have a full outer shell D) atoms overlap and share protons
A) groups with similar properties B) days of the month nobody wants to be doing chemistry! C) horizontal rows D) vertical columns
A) Uub B) Ag C) N D) O
A) rings around the outside of the nucleus B) the three dimensional structure atoms form when they bond C) the heavy core of an atom D) Part of a salad
A) proton B) nucleus C) atom D) ion
A) 16 B) 2 C) 6 D) 8
A) electrons only B) neutrons only C) Protons only D) Protons and electrons
A) the sum of the protons and the electrons B) the number of electrons and the number of protons C) the number of electrons only D) the number of neutrons
A) these kinds of atoms do not bond at all ever B) the atom is desperate to gain one more electron to have a full outer shell C) only one atom can exist at a time D) only one type of atom is in the molecule
A) Sodium B) Natrium C) Sodinium D) Nullaborium
A) Atoms have a stonger hold on their electrons as you go down the group B) Atoms have increasing numbers of electrons in their outer shell as you move down the group C) Atoms get smaller as you move down the group, so they need less energy D) Atoms get larger as you move down the the group so the electrons are less strongly attracted to the nucleus
A) Phosphorous pentachloride B) phosphorous dichloride C) pentachloride monophosphorate D) PentaPhosphorous dichloride
A) carbonate B) carbohydrate C) carbonohydrogenate D) hydrocarbon
A) the properties of hydrocarbons and their reactions B) All the chemical reactions that take place inside the human body C) how to grow fresh fruit and vegetables without chemicals D) How musical instruments can be used to poison people
A) Alkaloids B) Alkenes C) Alkanes D) Alkynes
A) They come in many forms B) They are made of carbon C) they are synthetically produced by humans D) They are made from oil, which was made from the remains of dead plants and animals
A) carbon atoms bonding in pairs B) glass C) four carbon atoms bonding together D) Carbon atoms arranged in a lattice with each atom bonding with 6 other atoms
A) Aristotle B) Henry Moseley C) Mr Thompson D) Dmitri Mendeleev
A) lanthinides and the semi-metals B) Artificial and predicted elements C) lanthanides and Actinides D) transition elements and the silicons
A) The Alkali Earth metals B) The transition metals C) The alkali metals D) The noble gases
A) Charcoal, diamond, graphite and buckyballs. B) Oxygen, Nitrogen, Hydrogen and Helium. C) People, plants, natural gas and carbon dioxide. D) fossil fuels, plastics, litter and the greenhouse effect.
A) a substance made up of atoms with the same atomic number B) a charged atom. C) A combination of several atoms bonded covalently D) A pure and rare substance
A) Scientists have taken photographs of electrons with high speed cameras. B) Scientists can see them using a Scanning Electron Microscope C) Scientists have collected indirect evidence about the way they bahave and interact. D) You can see them with a microscope in the laboratory.
A) Atomic number-mass number B) Protons + electrons C) Mass number - atomic number D) Neutrons = protons |