4 Which quantity represents the number of protons in an atom?

(1) atomic number

(2) oxidization number

(3) number of neutrons

(4) number of valence electrons

What is chemical change

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K? Round to the nearest hundredths place.

Storms in the South Pacific can create waves that travel all the way to the California coast, which are 12,000 km away. How long does it take them if they travel at 15.0 m/s?

Which balanced equation represents a redox reaction? (1) CuCO3 (s) = = > CuO (s) + CO2 (g) (2) 2KClO3 (s) = = >2KCl (s) + 3O2 (g) (3) AgNO3 (aq) + KCl (aq) = = >AgCl (s) + KNO3 (aq) (4) H2SO4 (aq) + 2KOH (aq) = = > K2SO4 (aq) + 2H2O (l)

Write the complete symbol, including mass number and atomic number, for each atom. contains 28 protons and 30 neutrons : a. ^{58}_{28}Ni5828Ni contains 22 protons and 21 neutrons : b. ^{43}_{22}Ti4322Ti contains 15 electrons and 19 neutrons c.

Which is a cause of desertification? A. farming B. creating reservoirs C. overgrazing D. driving motor vehicles

What happens when the threat of exposure to dirty air is reduced in a community? There is enough oxygen available for people's lungs to function normally The amount of indoor air pollutants released during a fossil fuel burn decreases There is a

Is chicken noodle soup an element, a compound, a homogeneous mixture, or a heterogeneous mixture?

How is the amount of sunlight affect the makeup of an ecosystem

How many moles are in 65 g of carbon dioxide (CO2) ?