Which elements did the Curies discover?

thorium and polonium

radium and uranium

radium and polonium

uranium and curium

What happens to the atomic radius when an electron is lost

in chlorine gas, two chlorine atoms join to form a Cl2 (chlorine 2) molecule. How many pairs of valence electrons do the atoms share? What type of covalent bond is formed?

Which of the following plant adaptions aids savanna plants during droughts? A. spines B. water storage C. growth patterns D. bitter taste

In the unbalanced chemical reaction for the combustion of propane determine at standard temperature and pressure how many liters of carbon dioxide gas are produced if 15 liters of oxygen gas are completely consumed

What is the limiting reagent when 49.84 g of nitrogen react with 10.7 g of hydrogen according to this balanced equation: n2 (g) 3h2 (g) → 2nh3 (g) ?

What is common to all of the oxidation reactions in the krebs cycle?

What's the ratio of 80% hydrogen

Why is warmer near earth surface

A platinum wedding band contains 0.077 mol of platinum. How many atoms of platinum are in the 15-gram platinum wedding band?

In an ecosystem where 500,000 kcal of sunlight is available for producers, approximately how much chemical energy will be contained in secondary consumers?