A) 1 B) 5 C) 37 D) 2
A) NF3 B) NBr C) NCl2 D) NI4
A) period 2, group 2 B) 2,8,2 C) 10,2 D) 12
A) proton B) neutron C) atom D) electron
A) atoms in group 18 tend to be monatomic B) Group 18 is known as the noble gases C) All atoms in group 18 have 18 electrons D) All atoms have a full outer electron shell or 8 electrons in the outer shell
A) Sr (period 5) B) Ca (period 4) C) B (period 2) D) Mg (period 3)
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) Na B) So C) Sm D) S
A) Non-metals B) Halogens C) Metals D) Noble Gases
A) an inert gas B) an alkali earth metal C) a halogen D) an alkali metal
A) different metals B) atoms of the same type C) a metal and a non-metal D) non-metals only
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) days of the month nobody wants to be doing chemistry! B) groups with similar properties C) vertical columns D) horizontal rows
A) Uub B) N C) Ag D) O
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) proton C) atom D) ion
A) 6 B) 8 C) 16 D) 2
A) neutrons only B) electrons 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 sum of the protons and the electrons D) the number of neutrons
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 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 dichloride C) pentachloride monophosphorate D) Phosphorous pentachloride
A) carbohydrate B) carbonate C) hydrocarbon D) carbonohydrogenate
A) the properties of hydrocarbons and their reactions B) how to grow fresh fruit and vegetables without chemicals C) How musical instruments can be used to poison people D) All the chemical reactions that take place inside the human body
A) Alkanes B) Alkaloids C) Alkenes D) Alkynes
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) 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) Mr Thompson C) Aristotle D) Henry Moseley
A) lanthinides and the semi-metals B) lanthanides and Actinides C) Artificial and predicted elements D) transition elements and the silicons
A) The transition metals B) The Alkali Earth metals C) The noble gases D) The alkali metals
A) Charcoal, diamond, graphite and buckyballs. B) fossil fuels, plastics, litter and the greenhouse effect. C) People, plants, natural gas and carbon dioxide. D) Oxygen, Nitrogen, Hydrogen and Helium.
A) a charged atom. B) a substance made up of atoms with the same atomic number 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 have taken photographs of electrons with high speed cameras. C) Scientists have collected indirect evidence about the way they bahave and interact. D) Scientists can see them using a Scanning Electron Microscope
A) Protons + electrons B) Mass number - atomic number C) Neutrons = protons D) Atomic number-mass number |