PS.4.a Test Correction

Fluorine, Chlorine, and Iodine are all similar. They react in similar ways and are all toxic and very reactive. What best explains why they are all similar?

• They have the same energy levels.

• They have the same number of valence electrons.

• They have the same number of protons.

• They are different names for the same element.

Tags

NGSS.MS-PS1-1

Elements in the same group share the same number of ____________________.

• energy levels

• valence electrons

• protons

• neutrons

Allie and Benjamin were arguing about which elements would be the most similar. Allie stated that elements in the same period are the most similar because they have the same number of energy levels. Benjamin argued that elements in the same group are the most similar because they have the same valence electrons. Who is the most correct?

• Benjamin

• Allie

• Both

• Neither

What is the mass of the following atom? Enter only a number.

Tags

NGSS.MS-PS1-1

Based on the picture, what best is the following model characterized as?

• Isotope

• Ion

• Neutral Atom

Tags

NGSS.MS-PS1-1

Using a periodic table, what is the name of the following atom?

• Carbon

• Oxygen

• Magnesium

• Silicon

Tags

NGSS.MS-PS1-1

A Chlorine atom has an atomic number of 17. What is the period number of the chlorine atoms?

• 17

• 35

• 17

• 3

Tags

NGSS.MS-PS1-1

What is the group number for Bismuth?

• 83

• 209

• 5

• 15

Select every particle located inside the nucleus.

• proton

• neutron

• electron

• megatron

What is used to identify the atom on the periodic table?

• The number of protons

• The number of protons plus neutrons

• The number of electrons

• The number of protons minus electrons