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