1Q Most Missed

Based on this Bohr model, what can we conclude about all atoms?

Pick 2 answers.

• the number of protons and the number of electrons are always the same

• the number of protons is also known as the mass number

• the number of protons is also known as the atomic number

• the number of protons and the number of electrons are always vary

Based on this Bohr model, what can we conclude about this atom?

Pick 2 answers.

• it is a member of period 3

• it has 4 energy levels

• it is a member of group 1

• it has 1 energy level

what does the dot diagram of this element look like?

• it has 3 dots around it

• it has 11 dots around it

• it has 1 dot around it

• it has 12 dots around it

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

which is the element with the highest electronegatity of the entire table?

• N

• O

• F

• Cs

Moving from left to right across a period, electronegativity -

• increases

• decreases

• is constant

• is random

Element X has four naturally occurring stable isotopes. Calculate its average atomic mass given the following data.

Round your answer to the nearest hundredth of an amu in the grid provided below.

• 40.108

• 40.11

• 38.37

• 96.00

This could be the dot diagram of

• P
• Ar
• Na
• B

As a distant star moves away from Earth, the light given off by the star has a measurably lower frequency. What happens to the wavelength and energy of the photons of light when the frequency becomes lower?

• The wavelength becomes longer, and the energy decreases.

• The wavelength becomes shorter, and the energy decreases.

• The wavelength becomes longer, and the energy increases.

• The wavelength becomes shorter, and the energy increases.

Gold (Au) is classified as a pure substance. Which of its properties supports this classification?

• Gold occurs in nature as a solid.

• Gold is resistant to rust and tarnish.

• Gold has a high melting point.

• Gold is made of one kind of atom.