Is this a model of an element, a compound, or a mixture? Explain your reasoning.

Heya dearfirst love doesn't matter what the it's just happen so we cannot say that minor in love with someone over 18 years old

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

Density and pressure

The air is going to come out because of the low pressure.