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