NJSLA Review

What is the primary purpose of the periodic table of the elements?

• To organize the chemical elements.

• To display the atomic weights of elements.

• To show the history of elements.

• To categorize elements based on their color.

Tags

NGSS.MS-PS1-1

The mass of an atom is primarily determined by the sum of which particles?

• Protons and neutrons.

• Electrons and protons.

• Neutrons and electrons.

• Protons only.

In a neutral atom, the number of protons is equal to the number of what?

• Electrons.

• Neutrons.

• Atoms.

• Molecules.

What influences the behavior and reactivity of elements within the same group in the periodic table?

• The number of valence electrons.

• The atomic mass of the elements.

• The number of neutrons in the nucleus.

• The density of the elements.

Part 1: Based on the information provided and Figure 1, which of the following is correct? Select two of the four statements.

• A. Oxygen and nitrogen will have similar physical and chemical properties.

• B. Gallium (Ga) and germanium (Ge) are part of the same family or group.

• C. Phosphorus is the only element with 15 protons.

• D. Beryllium (Be) and calcium (Ca) will have similar physical and chemical properties.

Tags

NGSS.MS-PS1-1

In chemical reactions, what is conserved?

• Mass

• Energy

• Both mass and energy

• Neither mass nor energy

Tags

NGSS.MS-PS1-5

Avery and Noah are working on a science project about nuclear reactions. They come across a diagram in their textbook. What is shown in Figure 1?

Tags

NGSS.HS-PS1-8

According to the information provided, what is the mass number of the krypton atom produced when a uranium atom is fissioned?

• 236

• 92

• 91

• 380

Tags

NGSS.HS-PS1-8

According to Newton's second law of motion, what is the relationship between net force and acceleration?

• The net force exerted on an object is related to its mass and its acceleration.

• The net force is inversely proportional to the velocity of the object.

• The net force is equal to the gravitational force acting on the object.

• The net force is independent of the object's mass.

Tags

NGSS.MS-PS2-2

In the experiment described, what tools did the students use to measure force and acceleration?

• They used a force sensor to measure the force and an accelerometer to measure the acceleration.

• They used a thermometer to measure the force and a barometer to measure the acceleration.

• They used a ruler to measure the force and a stopwatch to measure the acceleration.

• They used a scale to measure the force and a speedometer to measure the acceleration.