How many neutrons does element X have if its atomic number is 21 and its mass number is 95?

If an iron nail is placed in a glass of water the nail will sink. Is the density of iron smaller than or larger than the density of water? explain

How many p orbitals are filled in fluorine?

What does measurement mean

The options are: (it can't be repeated) 1-synthetic polymer 2-natural polymer 3-gamma radiation 4-condensation polymerization 5-addition polymerization

Is a salt neutral or a charged particle?

How fast do p waves travel?

Calcule o calor especifico do estanho sabendo que foram necessarias 100 cal para elevar em 20ºC a temperatura de 100 g de estanho

The electric force between two charged objects is 0.24 newtons. If the distance between them is increased by a factor of 4, what will be the new force? A. 0.015 newtons B. 0.03 newtons C. 0.06 newtons D. 0.12 newtons E. 0.36 newtons

Why do you need a balanced equation for stoichiometry?

The density of gold is 19.3 g/cm3. What is the volume of a 13 g gold nugget?