Question

atomic structure
the atom has 3 subatomic particles:
symbol
location
charge
mass
determines the ...... of the atom
based on the $^{25}na^+$, how do you determine the # of .....?
atomic mass = number of
atomic number = number of

Explanation:

Step1: Identify proton info

Symbol: p⁺; Location: Nucleus; Charge: +1; Mass: 1 amu; Determines atomic number; For ²⁵Na⁺, number is atomic number (11).

Step2: Identify neutron info

Symbol: n⁰; Location: Nucleus; Charge: 0; Mass: 1 amu; Contributes to atomic mass; For ²⁵Na⁺, 25 - 11 = 14.

Step3: Identify electron info

Symbol: e⁻; Location: Electron - shells; Charge: - 1; Mass: ~0 amu; Determines ion charge; For ²⁵Na⁺, 11 - 1 = 10.

Step4: Fill atomic mass/number blanks

Atomic Mass = number of protons + neutrons; Atomic Number = number of protons.

Answer:

	Protons	Neutrons	Electrons
Location	Nucleus	Nucleus	Electron - shells
Charge	+1	0	-1
Mass	1 amu	1 amu	~0 amu
Determines the ... of the atom	Atomic number	Contributes to atomic mass	Determines ion charge
Based on the ²⁵Na⁺, how do you determine the # of ...?	Atomic number (11)	25 - 11 = 14	11 - 1 = 10

Atomic Mass = number of protons + neutrons in the atom
Atomic Number = number of protons in the atom