A) 1 B) 5 C) 37 D) 2
A) NF3 B) NI4 C) NCl2 D) NBr
A) 2,8,2 B) 10,2 C) period 2, group 2 D) 12
A) atom B) proton C) neutron D) electron
A) Group 18 is known as the noble gases B) All atoms in group 18 have 18 electrons C) All atoms have a full outer electron shell or 8 electrons in the outer shell D) atoms in group 18 tend to be monatomic
A) Ca (period 4) B) Sr (period 5) C) B (period 2) D) Mg (period 3)
A) Sulfur S (period 3, group 16) B) Osmium (Os) because its symbol also starts with O C) Neon Ne (period 2, group 18) D) Nitrogen N (period 2, group 15)
A) Na B) Sm C) So D) S
A) Metals B) Halogens C) Non-metals D) Noble Gases
A) an alkali metal B) an alkali earth metal C) an inert gas D) a halogen
A) a metal and a non-metal B) atoms of the same type C) non-metals only D) different metals
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) horizontal rows C) days of the month nobody wants to be doing chemistry! D) vertical columns
A) Ag B) Uub C) O D) N
A) Part of a salad B) the heavy core of an atom C) the three dimensional structure atoms form when they bond D) rings around the outside of the nucleus
A) nucleus B) ion C) atom D) proton
A) 6 B) 16 C) 8 D) 2
A) Protons only B) neutrons only C) electrons only D) Protons and electrons
A) the number of electrons and the number of protons B) the number of neutrons C) the sum of the protons and the electrons D) the number of electrons only
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 type of atom is in the molecule D) only one atom can exist at a time
A) Natrium B) Sodium C) Sodinium D) Nullaborium
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 dichloride C) pentachloride monophosphorate D) Phosphorous pentachloride
A) carbonohydrogenate B) carbonate C) hydrocarbon D) carbohydrate
A) the properties of hydrocarbons and their reactions B) All the chemical reactions that take place inside the human body C) How musical instruments can be used to poison people D) how to grow fresh fruit and vegetables without chemicals
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) four carbon atoms bonding together B) Carbon atoms arranged in a lattice with each atom bonding with 6 other atoms C) glass D) carbon atoms bonding in pairs
A) Aristotle B) Dmitri Mendeleev C) Henry Moseley D) Mr Thompson
A) transition elements and the silicons B) Artificial and predicted elements C) lanthanides and Actinides D) lanthinides and the semi-metals
A) The transition metals B) The alkali metals C) The noble gases D) The Alkali Earth metals
A) Charcoal, diamond, graphite and buckyballs. B) People, plants, natural gas and carbon dioxide. C) fossil fuels, plastics, litter and the greenhouse effect. D) Oxygen, Nitrogen, Hydrogen and Helium.
A) A combination of several atoms bonded covalently B) A pure and rare substance C) a substance made up of atoms with the same atomic number D) a charged atom.
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) Protons + electrons B) Neutrons = protons C) Mass number - atomic number D) Atomic number-mass number |