Chem final study guide

In which of the following sets are symbols of the element, the number of protons, and number of electrons given correctly?

• H, 2 protons, 2 electrons

• Cu, 29 protons, 58 electrons

• Ag, 47 protons, 47 electrons

• Cl, 17 protons, 18 electrons

• Ba, 56 protons, 132.9 electrons

Which of the following quantum jumps would be associated with the smallest energy of emitted light?

• n=2 to n=5

• n=4 to n=1

• n=4 to n=2

• n=5 to n=3

How many centimeters in 24 m

• 0.00024 cm

• 2400 cm

• 0.24 cm

• 2,400,000 cm

Which of the following increases with increasing atomic number in a period?

• shielding

• charge on the atom

• ionization energy

• atomic radius

What unit of electromagnetic energy that behaves as a particle called?

• charm

• protons

• electron

• photons

• muons

if the temperature changes by 100 C, by how many degrees does it change in K

• 100

• 273

• 373

• 37

• 0

how many sigfigs (significant figures) are there in the measurement, 0.001040

• 3

• 5

• 2

• 4

locate the following elements on the periodic table: S, Cl, Se, Br. Which of these elements has the largest first ionization energy?

• sulfur

• chlorine

• selenium

• bromine

As a consequence of the discovery of electrons by Thomson, which model of the atoms was believed to be true?

• the nucleus is made of electrons and protons

• the protons, electrons, and neutrons are evenly distributed throughout the volume of the atom

• the atom is a large positive sphere with negative charges (electrons) embedded in it

• the nucleus is made of neutrons only

a mole of lead and a mole of helium contain the same number of…

• protons

• grams

• atoms

• molecules