What subatomic particle causes atoms to have different isotopes?
How many electrons can the second shell be filled up to?
Which separation technique allows you to separate a liquid and a dissolved solid, but keep the liquid too?
This scientist figured out there was atoms contain a positive nucleus, by firing alpha particles at gold.
When going down group 1, the reactivity increases.
Who is most often credited with being the creator of the modern periodic table?
Group 7 elements are commonly known as [blank_start]Halogens[blank_end]. They normally exist as [blank_start]pairs[blank_end] of atoms.
They become [blank_start]less[blank_end] reactive down the group – because the [blank_start]outer[blank_end] shell is further from the nucleus so it is [blank_start]harder[blank_end] to gain an electron.
They have higher melting and boiling points [blank_start]down[blank_end] the group.
A more reactive halogen will [blank_start]displace[blank_end] a less reactive halogen.
Tick all the boxes that reference the typical/general properties of metals.
[blank_start]Simple distillation[blank_end] is a method for separating the [blank_start]solvent[blank_end] from a [blank_start]solution[blank_end], leaving behind the [blank_start]solute[blank_end]. This method works because the solvent has a much lower [blank_start]boiling point[blank_end] than the dissolved solute. Heating the solution allows the solvent to [blank_start]evaporate[blank_end], and then it passes through a condenser, where it is cooled and condensed into a separate container. The [blank_start]solute[blank_end] does not evaporate and so it stays behind.
Lithium has an electron configuration of 2.1
Sodium has an electron configuration of [blank_start]2.8.1[blank_end]
Carbon has an electron configuration of [blank_start]2.4[blank_end]
Neon has an electron configuration of [blank_start]2.8[blank_end]
Sulfur has an electron configuration of [blank_start]2.8.6[blank_end]