If the atomic number of an element is 7 and its mass number is 18, how many neutrons are in the atom's nucleus?

Which process is exothermic? (1) boiling of water (2) melting of copper (3) condensation of ethanol vapor (4) sublimation of iodine

The wave-mechanical model of the atom is required to explain the (1) mass number and atomic number of an atom (2) organization of atoms in a crystal (3) radioactive nature of some atoms (4) spectra of elements with multielectron atoms

When an acid reacts with a base, what compounds are formed?

How do you do double replacement reactions?

Which statement correctly compares the thicknesses of Earth's layers? Earth's mantle is thinner than its oceanic crust. Earth's outer core is thicker than its mantle. Earth's continental crust is thicker than its lithosphere.

how do geologists use seismic waves to locate an earthquakes epicenter

Which formula id correctly paired with its name? A. MgSO↓ = magnesium chlorine B. FeO = iron (|||) oxide C. K↓2O = Phosphorus dioxide D. CuCI↓2 = copper (||) chloride

Suppose you find a rock that contains some potassium-40 (half-life of 1.3 billion years). you measure the amount and determine that there are 5 grams of potassium-40 in the rock.

What are some positive and negative effects of the production of maple syrup on society and the environment?

Describe and give an example of parasitism.