Element's Identity & Reactivity

Match the following

• Valence Electrons

• Reactivity

• Atomic Mass

• Element's Identity

• Atomic Number (protons)

• Number of Protons + Neutrons

Tags

NGSS.MS-PS1-2

Sodium and lithium have similar chemical properties. What characteristic of these elements explains why they are chemically similar?

• Their atoms both have one valence electron

• Their atoms both have more neutrons than protons

• Their atoms have the same number of energy levels

• Their atoms contain equal numbers of protons and electrons

Tags

112.20.b.5.B

Atoms of which two elements are represented by these models?

• Oxygen, O, and neon, Ne

• Fluorine, F, and neon, Ne

• Silicon, Si, and phosphorous, P

• Beryllium, Be, and boron, B

Tags

112.20.b.5.B

Which pair of elements has reactivity that is similar to chlorine, Cl?

• Fluorine, F, and argon, Ar

• Fluorine, F, and iodine, I

• Sulfur, S, and bromine, Br

• Sulfur, S, and argon, Ar

Tags

112.20.b.5.B

Atoms of which element has a combined total of 11 protons?

• Sodium, Na

• Boron, B

• Copper, Cu

• None of these

Tags

112.20.b.5.B

In this model, which particle determines the reactivity of this atom?

• Particle W

• Particle X

• Particle Y

• Particle Z

Tags

112.20.b.5.B

Based on these drawings, which element is the LEAST reactive?

• 
• 
• 
• 

Tags

112.20.b.5.B

Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid?

• Boron is the most reactive because it has the most protons

• Fluorine is the most reactive because it has 7 electrons in the outer shell

• Silicon is the most reactive because it has an equal number of protons and neutrons

• Gallium is the most reactive because it has many more neutrons than protons

Tags

112.20.b.5.B

Four students were asked to name the parts of an atom that determine that atom's identity and chemical properties. The students' responses are shown in the table. Which student's responses are correct?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

112.20.b.5.B

Tin, Sn, is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin?

• Tin atoms have 50 protons

• Tin atoms have 5 valence electrons

• Tin atoms have 119 neutrons

• Tin atoms have 68 electrons

Tags

112.20.b.5.B