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