Multiple ChoiceWhat is the smallest unit of gold that retains the chemical properties of gold?48views
Multiple ChoiceHow does the size of oxygen’s nucleus affect the distribution of electrons in a water (H₂O) molecule?47views
Multiple ChoiceAn atom with its first two electron shells completely filled would contain how many electrons?55views
Multiple ChoiceCopper is an element with 29 protons in its nucleus. What is the atomic number of copper?100views