1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ella [17]
3 years ago
8

Help me with this I don’t understand it

Chemistry
1 answer:
Katyanochek1 [597]3 years ago
7 0

4. Gold: 79 Protons 118 Neutrons 79 Electrons

Potassium: Protons 19 Neutrons 20 19 Electrons

Copper: Protons 29 Neutrons 35 electrons 29

Oxygen: Protons 8 Neutrons 8 Electrons 8

Argon: Protons 18 Neutrons 22 Electrons 18

And for the Element with the symbol Ca: Calcium: Protons 20 Neutrons 20 Electrons 20


1. Atomic Number

2. Atomic Mass

3. How many protons are in the atom or in other words the atomic number.



You might be interested in
When two air masses meet what do they form?
Yanka [14]

Answer:

ice. ......

Explanation:

because it cold

6 0
3 years ago
Read 2 more answers
What are some examples of mutation​
Shtirlitz [24]
A dog with a fifth leg or someone with and extra finger
8 0
3 years ago
I'll give brainliest!!
Ivahew [28]

Answer:

to mi understanding iz fusion reaction

6 0
3 years ago
Calculate the pH of a 0.10 M HCN solution that is 0.0070% ionized.
Anastaziya [24]

Answer:

D) 5.15

Explanation:

Step 1: Write the equation for the dissociation of HCN

HCN(aq) ⇄ H⁺(aq) + CN⁻(aq)

Step 2: Calculate [H⁺] at equilibrium

The percent of ionization (α%) is equal to the concentration of one ion at the equilibrium divided by the initial concentration of the acid times 100%.

α% = [H⁺]eq / [HCN]₀ × 100%

[H⁺]eq = α%/100% × [HCN]₀

[H⁺]eq = 0.0070%/100% × 0.10 M

[H⁺]eq = 7.0 × 10⁻⁶ M

Step 3: Calculate the pH

pH = -log [H⁺] = -log 7.0 × 10⁻⁶ = 5.15

7 0
3 years ago
(03.04 MC)<br> What is the formula for sodium nitrite?<br> O NaN<br> O NaN<br> O NaNO2<br> O NaNO3
charle [14.2K]

Answer:

NaNO2 is the formula for sodium nitrite

Explanation:

Check the selected ions chart to find out more in depth.

7 0
4 years ago
Read 2 more answers
Other questions:
  • Which reaction represents an acid-base neutralization reaction?
    6·2 answers
  • 7) Convert 8.34 x 10^-6 Kg to cg"
    8·1 answer
  • Write a balanced molecular reaction for the hydrogenation of ethyne to the saturated alkane.
    15·1 answer
  • If 8.0 g of NH4HS(s) is placed in a sealed vessel with a volume of 1.0 L and heated to 200 ∘C the reaction NH4HS(s) ⇌ NH3(g) + H
    8·1 answer
  • Give two reasons why quarrying is bad for the enviroment
    8·1 answer
  • How does a forest fire model the energy flow of fuel combustion?
    5·1 answer
  • Which of the following is not the same as 0.032 liters?<br> a)32 mL<br> b)0.00032 hL<br> c)320 cL
    6·1 answer
  • Which coefficient placed before HCl will balance the following<br> equation? Zn+HCI ZnCl2 + H2
    5·1 answer
  • What is ionisation enthalpy?​
    7·2 answers
  • (01.05 LC)
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!