the half life for the decay of radium is 1620 years. what is the rate constant for this first-order process?

Lewis structure and molecular geometry for nh2cl

Predict the products butane (c4h10) + oxygen —>

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent