part ii: atom screen
1. click on the + sign for each of the boxes (element name, net charge, and mass number) to view changes as you change the number of particles in the atom.
2. what particle(s) are found in the center of the atom?
3. play until you discover which particle(s) determine(s) the name of the element you build. which particle is it?
4. what is the name of the following atoms?
a. an atom with 3 protons and 4 neutrons: ______
b. an atom with 2 protons and 4 neutrons: ______
c. an atom with 4 protons and 4 neutrons: ______
5. play with the simulation to discover which particles affect the charge of an atom or ion. which particles are they?
6. fill in the blanks below to show your results:
a. neutral atoms have ______ the same number of ______ protons and electrons.
b. positive ions have ______ protons than electrons.

Question

part ii: atom screen
1. click on the + sign for each of the boxes (element name, net charge, and mass number) to view changes as you change the number of particles in the atom.
2. what particle(s) are found in the center of the atom?
3. play until you discover which particle(s) determine(s) the name of the element you build. which particle is it?
4. what is the name of the following atoms?
   a. an atom with 3 protons and 4 neutrons: ______
   b. an atom with 2 protons and 4 neutrons: ______
   c. an atom with 4 protons and 4 neutrons: ______
5. play with the simulation to discover which particles affect the charge of an atom or ion. which particles are they?
6. fill in the blanks below to show your results:
   a. neutral atoms have ______ the same number of ______ protons and electrons.
   b. positive ions have ______ protons than electrons.

Accepted Answer

### Question 2: What particle(s) are found in the center of the atom?
# Brief Explanations:
The center of an atom is the nucleus. The nucleus contains protons (positively charged) and neutrons (neutral). Electrons are found in the electron cloud surrounding the nucleus. So the particles in the center (nucleus) are protons and neutrons.
# Answer: Protons and neutrons

### Question 3: Play until you discover which particle(s) determine(s) the name of the element you build. Which particle is it?
# Brief Explanations:
The identity of an element (its name) is determined by the number of protons in its nucleus. Each element has a unique number of protons (atomic number). Changing the number of neutrons changes the isotope, and changing electrons changes the ion, but the element's name is based on protons.
# Answer: Proton (the number of protons determines the element's name)

### Question 4: What is the name of the following atoms?
#### a. An atom with 3 protons and 4 neutrons:
# Brief Explanations:
The number of protons is the atomic number. An element with atomic number 3 is lithium (Li). The mass number is protons + neutrons = 3 + 4 = 7, so it's lithium - 7, but the element name is lithium.
# Answer: Lithium

#### b. An atom with 2 protons and 4 neutrons:
# Brief Explanations:
Atomic number 2 corresponds to helium (He). Mass number is 2 + 4 = 6, so it's helium - 6, and the element name is helium.
# Answer: Helium

#### c. An atom with 4 protons and 4 neutrons:
# Brief Explanations:
Atomic number 4 is beryllium (Be). Mass number is 4+4 = 8, so it's beryllium - 8, and the element name is beryllium.
# Answer: Beryllium

### Question 5: Play with the simulation to discover which particles affect the charge of an atom or ion. Which particles are they?
# Brief Explanations:
The charge of an atom or ion is determined by the balance between protons (positive charge) and electrons (negative charge). Neutrons have no charge. If an atom gains or loses electrons, its charge changes (forms an ion). Protons are in the nucleus and their number defines the element, but the charge is a result of proton - electron balance. So electrons (and protons, but mainly the change in electrons relative to protons) affect the charge. Specifically, electrons (since protons are fixed for an element, adding/removing electrons changes charge).
# Answer: Electrons (and the balance with protons; changing the number of electrons relative to protons changes the charge)

### Question 6: Fill in the blanks below to show your results:
#### a. Neutral atoms have ____ the same number of ____ protons and electrons.
# Brief Explanations:
In a neutral atom, the positive charge from protons is balanced by the negative charge from electrons. So the number of protons (positive) equals the number of electrons (negative), resulting in a net charge of zero.
# Answer: the same number of; protons and electrons (completed as "Neutral atoms have the same number of protons and electrons.")

#### b. Positive ions have ____ more protons than electrons.
# Brief Explanations:
A positive ion (cation) is formed when an atom loses one or more electrons. So the number of protons (positive) is greater than the number of electrons (negative), resulting in a net positive charge.
# Answer: more protons than electrons (completed as "Positive ions have more protons than electrons.")

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QUESTION IMAGE

Question

Explanation:

Question 2: What particle(s) are found in the center of the atom?

Answer:

Question 3: Play until you discover which particle(s) determine(s) the name of the element you build. Which particle is it?