Atomic Structure and Theory

What did Ernest Rutherford discover with his experiment?

• Protons

• Electrons

• Nucleus

• Neutrons

Tags

NGSS.HS-PS1-8

Calculate the average atomic mass of an element with isotope 1 (56.725 amu) 56.34% & isotope 2 (58.253) 43.66%.

• 56.23 amu

• 57.39 amu

• 58.92 amu

• 57. 85 amu

What is the average atomic mass of of nitrogen if it's isotopes consist of the following: N - 13 (12.998 amu) 5.67%, N-14 (14.02 amu) 92.35%, & N-15 (14.998 amu) 1.98%?

• 13.98 amu

• 14.35 amu

• 13.23 amu

• 14.95 amu

How many protons and neutrons are in the above notation?

• 29 protons & 92 neutrons

• 63 protons & 29 neutrons

• 29 protons & 63 neutrons

• 29 protons & 34 neutrons

As wavelength increases, what happens to the frequency?

• Increases

• Decreases

• Stays the same

• Doubles

Tags

NGSS.HS-PS4-1

As frequency increases, what happens to the energy?

• Increases

• Decreases

• Stays the same

• Doubles

What does the atomic mass of an element tell you?

• The mass of a randomly chosen atom of that element

• The weighted average mass of the naturally occurring atoms of that element

• The mass of every atom of that element

• The mass of the atom of the most common isotope of that element

2 isotopes make up nearly all atoms of Phosphorus. Phosphorus-30 is 30.02 amu, Phosphorus - 31 is 31.02 amu. Since the average atomic mass of Phosphorus is 30.9738, what can you tell about the two isotopes?

• They are about equally abundant

• Phosphorus - 30 is the more abundant isotope

• Phosphorus - 31 is the more abundant isotope

• None of these

What is the relative mass and charge of a proton?

• Mass = 1 amu, -1

• Mass = 1 amu, +1

• Mass = 1 amu, 0

• Mass = 1/1840 amu, +1

What is the relative mass and charge of a neutron?

• Mass = 1 amu, -1

• Mass = 1 amu, +1

• Mass = 1 amu, 0

• Mass = 1/1840 amu, +1