Question

question 4 (1 point)
(02.01 mc)
the table compares the number of subatomic particles in two atoms:
subatomic particle comparison
atom|protons|electrons|neutrons
q|11|11|12
r|11|10|12
which of the following is true about the two atoms?
○ a they have the same charge and same mass.
○ b they have the same charge but different masses.
○ c they have different charges but the same mass.
○ d they have different charges and different masses.

question 5 (1 point)
(02.04 lc)
what is the highest point of a wave called?
○ a amplitude
○ b crest
○ c frequency
○ d trough

Explanation:

Question 4

Step1: Analyze charge of atoms

Charge of an atom is determined by protons (positive) and electrons (negative). For Atom Q: Charge = Protons - Electrons = \(11 - 11 = 0\) (neutral). For Atom R: Charge = \(11 - 10 = +1\) (positive). So charges are different.

Step2: Analyze mass of atoms

Mass of an atom is mainly from protons and neutrons (mass of electron is negligible). Mass number = Protons + Neutrons. For Atom Q: \(11 + 12 = 23\). For Atom R: \(11 + 12 = 23\). So masses are same.

In wave terminology, the highest point of a wave is called the crest. Amplitude is the height from rest to crest/trough, frequency is cycles per unit time, and trough is the lowest point.

Answer:

c. They have different charges but the same mass.

Question 5