Question

name:
atomic structure review
use a periodic table to help you fill in the chart below. mass numbers are rounded to the nearest whole number.
remember:
atomic number = number of protons = number of electrons
mass number = number of protons + number of neutrons

element	symbol	atomic number	mass number	number of protons	number of neutrons	number of electrons
	ga		40
				26		26
silicon			28
	ar
					10	9
silver					64

Explanation:

To solve the atomic structure chart, we use the following rules:

• Atomic number = number of protons = number of electrons (in neutral atoms).
• Mass number = number of protons + number of neutrons.

1. Beryllium

• Symbol: Be (from periodic table, atomic number 4 is Beryllium).
• Atomic Number: 4 (given).
• Number of Protons: 4 (atomic number = protons).
• Number of Electrons: 4 (protons = electrons in neutral atoms).
• Mass Number: From periodic table, Beryllium’s mass number is ~9 (neutrons = mass number – protons = \( 9 - 4 = 5 \)).

2. Ga (Gallium)

• Element: Gallium (symbol Ga).
• Atomic Number: From periodic table, Ga has atomic number 31.
• Number of Protons: 31 (atomic number = protons).
• Number of Electrons: 31 (protons = electrons).
• Number of Neutrons: Mass number (40) – protons (31) = \( 40 - 31 = 9 \).

3. Element with 26 Protons/Electrons

• Element: Iron (Fe, atomic number 26).
• Symbol: Fe.
• Atomic Number: 26 (protons = 26).
• Mass Number: From periodic table, Fe’s mass number is ~56 (neutrons = \( 56 - 26 = 30 \)).

4. Silicon (Mass Number 28)

• Symbol: Si (Silicon).
• Atomic Number: 14 (Si has atomic number 14).
• Number of Protons: 14 (atomic number = protons).
• Number of Electrons: 14 (protons = electrons).
• Number of Neutrons: Mass number (28) – protons (14) = \( 28 - 14 = 14 \).

5. Ar (Argon)

• Element: Argon (symbol Ar).
• Atomic Number: 18 (Ar has atomic number 18).
• Number of Protons: 18 (atomic number = protons).
• Number of Electrons: 18 (protons = electrons).
• Mass Number: From periodic table, Ar’s mass number is ~40 (neutrons = \( 40 - 18 = 22 \)).

6. Element with 10 Neutrons, 9 Electrons

• Atomic Number: 9 (electrons = 9, so protons = 9).
• Element: Fluorine (F, atomic number 9).
• Symbol: F.
• Mass Number: Protons (9) + neutrons (10) = \( 9 + 10 = 19 \).

7. Silver

• Symbol: Ag (Silver).
• Atomic Number: 47 (Ag has atomic number 47).
• Number of Protons: 47 (atomic number = protons).
• Number of Electrons: 47 (protons = electrons).
• Mass Number: Protons (47) + neutrons (54) = \( 47 + 54 = 101 \).

Filled Chart (Summary):

Element	Symbol	Atomic Number	Mass Number	Protons	Neutrons	Electrons
Gallium	Ga	31	40	31	9	31
Iron	Fe	26	56	26	30	26
Silicon	Si	14	28	14	14	14
Argon	Ar	18	40	18	22	18
Fluorine	F	9	19	9	10	9
Silver	Ag	47	101	47	54	47

(Note: Mass numbers are approximate from the periodic table, rounded to whole numbers.)

Answer:

To solve the atomic structure chart, we use the following rules:

• Atomic number = number of protons = number of electrons (in neutral atoms).
• Mass number = number of protons + number of neutrons.

1. Beryllium

• Symbol: Be (from periodic table, atomic number 4 is Beryllium).
• Atomic Number: 4 (given).
• Number of Protons: 4 (atomic number = protons).
• Number of Electrons: 4 (protons = electrons in neutral atoms).
• Mass Number: From periodic table, Beryllium’s mass number is ~9 (neutrons = mass number – protons = \( 9 - 4 = 5 \)).

2. Ga (Gallium)

• Element: Gallium (symbol Ga).
• Atomic Number: From periodic table, Ga has atomic number 31.
• Number of Protons: 31 (atomic number = protons).
• Number of Electrons: 31 (protons = electrons).
• Number of Neutrons: Mass number (40) – protons (31) = \( 40 - 31 = 9 \).

3. Element with 26 Protons/Electrons

• Element: Iron (Fe, atomic number 26).
• Symbol: Fe.
• Atomic Number: 26 (protons = 26).
• Mass Number: From periodic table, Fe’s mass number is ~56 (neutrons = \( 56 - 26 = 30 \)).

4. Silicon (Mass Number 28)

• Symbol: Si (Silicon).
• Atomic Number: 14 (Si has atomic number 14).
• Number of Protons: 14 (atomic number = protons).
• Number of Electrons: 14 (protons = electrons).
• Number of Neutrons: Mass number (28) – protons (14) = \( 28 - 14 = 14 \).

5. Ar (Argon)

• Element: Argon (symbol Ar).
• Atomic Number: 18 (Ar has atomic number 18).
• Number of Protons: 18 (atomic number = protons).
• Number of Electrons: 18 (protons = electrons).
• Mass Number: From periodic table, Ar’s mass number is ~40 (neutrons = \( 40 - 18 = 22 \)).

6. Element with 10 Neutrons, 9 Electrons

• Atomic Number: 9 (electrons = 9, so protons = 9).
• Element: Fluorine (F, atomic number 9).
• Symbol: F.
• Mass Number: Protons (9) + neutrons (10) = \( 9 + 10 = 19 \).

7. Silver

• Symbol: Ag (Silver).
• Atomic Number: 47 (Ag has atomic number 47).
• Number of Protons: 47 (atomic number = protons).
• Number of Electrons: 47 (protons = electrons).
• Mass Number: Protons (47) + neutrons (54) = \( 47 + 54 = 101 \).

Filled Chart (Summary):

Element	Symbol	Atomic Number	Mass Number	Protons	Neutrons	Electrons
Gallium	Ga	31	40	31	9	31
Iron	Fe	26	56	26	30	26
Silicon	Si	14	28	14	14	14
Argon	Ar	18	40	18	22	18
Fluorine	F	9	19	9	10	9
Silver	Ag	47	101	47	54	47

(Note: Mass numbers are approximate from the periodic table, rounded to whole numbers.)