Atoms of elements in the same group have the same number of (blank) This is why they have similar chemical properties. Please help its a timed quiz!

What metric units would you use to measure the thickness of a key

Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating

Equal numbers of moles of he(g), ar(g), and ne(g) are placed in a glass vessel at room temperature. if the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?