How many valence electrons does Calcium (Ca) have?
Which of these elements has six valence electrons?
Nitrogen will ____________ to make an ion
Name an element that makes +2 ions.
What charge ion does aluminum make?
Which of the following will produce a cation?
Why doesn't neon make ions?
True or False: Metals form anions
Which of the alkaline earth metals will has the largest electronegativity?
Which of the following elements has the largest atomic radius?
Which of these halogens has the smallest ionization energy?
How many electrons does a neutral chlorine atom have?
An atom has a mass number of 48 and a atomic number of 22. What element is it?
An atom has 7 protons, 7 electrons, and 8 neutrons. What is its mass number?
An atom has 27 protons, 27 electrons, and 28 neutrons. What element is it?
Which of the following elements is a metalloid?
What is NOT true of the halogens?
Who developed the first atomic theory by building on the research of Antoine Lavoisier and Joseph Proust?
What did JJ Thomson’s experiments lead him to believe the atom was most like?
How many neutrons does Copper-63 have?
What atom has 12 protons?
What particle has the least mass?
Which of these elements is a halogen?
What group is magnesium in?
Which of the following is a property of non-metals?
Which statement correctly describes a solid in a container?
Which of the following are incompressible?
What is it called when a gas becomes a liquid?
Which of the following is a chemical change?
Which of the following is a homogenous mixture?