I am at the centre of the atom and contain both neutrons and protons. What am I?

and

Complete the sentence:

Atoms have no overall

charge because ...

The combustion reaction of propane is described by the reaction. c3h8 5o2 → 4h2o 3co2. how many moles of o2 are required to generate 3 moles of co2

You push a friend sitting on a swing. she has a mass of 50kg and accelerates at a rate of 4 m/s2. find the force you exerted

What type of chemical bond is formed between two atoms of bromine 1. Metallic 2. hydrogen 3. Ionic 4. covalent

One flexible material you use everyday

What happens to the volume, mass, and density of most solids as their temperature increases?

Low density: low pressure: high density Is which. evaporation? water vapor? condensation / liquid water

Which structures are found on sponges? pores medusae polyps stinging cells

Coefficients in a chemical equation are used to: balance the number of atoms on both sides of the equation ensure that all subscripts on both sides of the equation are the same indicate energy changes that occur during the reaction indicate the type

What determines your blood cholesterol level?

Describe two ways that water moves through earthy atmosphere in the water cycle.