Milburn- Unit 3 Assessment

The nucleus of the atom is a positively charged region at the center of an atom, which consists of protons and neutrons.

• True

• False

Consider two atoms: one with 3 protons and one with 4 protons. Which statement is true considering the identities of the elements?

• One must know the numbers of electrons to know if they are different elements

• The atoms of of the same element

• The atoms must be of different elements

• One must know the numbers of neutrons to know if they are different elements

What makes an atom electrically neutral?

• There are many more electrons than either protons or neutrons

• Protons and electrons are replaced by neutrons

• There are equal numbers of protons and electrons

• There are far more neutrons than electrons

Which of the following is the correct electron configuration for Neon (Ne)?

• 1s² 2s² 2p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 6p²

• 1s1 2s2 2p²

Where are the electrons located in an atom?

• The location of the electrons depends on the specific type of atom

• Both inside and outside the nucleus

• Outside the nucleus only

• Inside the nucleus only

As an electron moves further away from the atom’s nucleus, its energy ______.

• Decreases

• Fluctuates randomly

• Increases

• First increases then decreases

The outermost electrons in a given atom are called what?

• Ionic electrons

• Conditional electrons

• Free electrons

• Valence electrons

To attain a stable octet, the number of electrons gained, lost, or shared must make up the difference between the ____________ of an atom and that of the nearest noble gas on the periodic table.

• Valency

• Excited state

• Ground state

• All of the above

Aluminum has...

• 13 protons

• 13 atomic mass

• 13 electrons

• 13 atomic number

The number of valence electrons _____ as we go down a group

• No answer choice

• Increases

• Decreases

• Remains the same