A) 5 B) 2 C) 1 D) 37
A) NCl2 B) NI4 C) NF3 D) NBr
A) period 2, group 2 B) 2,8,2 C) 12 D) 10,2
A) atom B) proton C) neutron D) electron
A) All atoms have a full outer electron shell or 8 electrons in the outer shell B) All atoms in group 18 have 18 electrons C) Group 18 is known as the noble gases D) atoms in group 18 tend to be monatomic
A) Mg (period 3) B) Ca (period 4) C) Sr (period 5) D) B (period 2)
A) Osmium (Os) because its symbol also starts with O B) Nitrogen N (period 2, group 15) C) Sulfur S (period 3, group 16) D) Neon Ne (period 2, group 18)
A) S B) So C) Na D) Sm
A) Noble Gases B) Halogens C) Metals D) Non-metals
A) a halogen B) an alkali earth metal C) an inert gas D) an alkali metal
A) a metal and a non-metal B) non-metals only C) atoms of the same type D) different metals
A) electron/s are shared between two atoms so both have a full outer shell B) atoms collect free electrons and use them as glue C) one atom steals the electron/s from another D) atoms overlap and share protons
A) vertical columns B) horizontal rows C) days of the month nobody wants to be doing chemistry! D) groups with similar properties
A) Ag B) O C) N D) Uub
A) rings around the outside of the nucleus B) Part of a salad C) the three dimensional structure atoms form when they bond D) the heavy core of an atom
A) atom B) ion C) proton D) nucleus
A) 8 B) 2 C) 16 D) 6
A) electrons only B) neutrons only C) Protons only D) Protons and electrons
A) the number of neutrons B) the sum of the protons and the electrons C) the number of electrons and the number of protons D) the number of electrons only
A) these kinds of atoms do not bond at all ever 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) only one atom can exist at a time
A) Sodinium B) Nullaborium C) Natrium D) Sodium
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 larger as you move down the the group so the electrons are less strongly attracted to the nucleus D) Atoms get smaller as you move down the group, so they need less energy
A) PentaPhosphorous dichloride B) Phosphorous pentachloride C) pentachloride monophosphorate D) phosphorous dichloride
A) carbonohydrogenate B) carbonate C) hydrocarbon D) carbohydrate
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) Alkenes B) Alkaloids C) Alkynes D) Alkanes
A) they are synthetically produced by humans B) They come in many forms C) They are made from oil, which was made from the remains of dead plants and animals D) They are made of carbon
A) glass B) carbon atoms bonding in pairs C) Carbon atoms arranged in a lattice with each atom bonding with 6 other atoms D) four carbon atoms bonding together
A) Aristotle B) Mr Thompson C) Henry Moseley D) Dmitri Mendeleev
A) Artificial and predicted elements B) transition elements and the silicons 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 charged atom. B) A pure and rare substance C) A combination of several atoms bonded covalently D) a substance made up of atoms with the same atomic number
A) Scientists have collected indirect evidence about the way they bahave and interact. B) Scientists can see them using a Scanning Electron Microscope C) You can see them with a microscope in the laboratory. D) Scientists have taken photographs of electrons with high speed cameras.
A) Neutrons = protons B) Protons + electrons C) Mass number - atomic number D) Atomic number-mass number |