The nucleus of the atom contains what subatomic particle(s)? protons only neutrons only electrons only protons and neutrons protons and electrons

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table