The nucleus of an atom of Cobalt-58 contains:

1. 27 protons and 31 neutrons

2. 27 protons and 32 neutrons

3. 59 protons and 60 neutrons

4.60 protons and 60 neutrons

The following balanced equation shows the decomposition of water (H2O). According to the equation, how many oxygen atoms are in the reactants? 2 H2O 2H2 + O2

How many protons electrons and neutrons does the isotope nitrogen 15 have

How many covalent bonds does oxygen form in electrically neutral compounds? express your answer numerically as an integer?

Which of the following is an example of a double replacement reaction? (a) 3Fe + 2O2 Fe3O4 (b) BaCl2 + K2CO3 BaCO3 + 2KCl (c) NiCO3 NiO + CO2 (d) Cl2 + 2NaBr 2NaCl + Br2

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O how many moles of ethane (C2H6) are required to produce 13.5 moles of water from the above reaction?

What is the enthaply of the reaction?

Which color has a higher frequency, A. red light B. blue light

what is the volume of 0.98 mol oxygen (O2) gas at 275 K and a pressure of 2.0 atm? (the universal gas constant is 0.0821 L*atm/mol*K)

Which element is classified as an alkali metal? Rb Sr Zr Cl

Which statements about a neutral atom are correct? Check all that apply. The positively charged particles in the nucleus are positrons. The radius of the electron cloud is twice as large as the radius of the nucleus.