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
pentagon [3]
3 years ago
7

What is the difference between a stable and unstable isotope

Chemistry
1 answer:
USPshnik [31]3 years ago
8 0

Stable isotopes are not radioactive nor dangerous.

Unstable isostopes are radioactive and have different mass of the element.

You might be interested in
Given the equation Ca + H2O --> Ca(OH)2 + H2 how many grams of calcium will react completely with 10.0 grams of water? *
Yuki888 [10]

Answer: 11.0 g of calcium will react with 10.0 grams of water.

Explanation:

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

moles of H_2O

\text{Number of moles}=\frac{10.0g}{18g/mol}=0.55moles

The balanced chemical equation is:

Ca+2H_2O\rightarrow Ca(OH)_2+H_2

According to stoichiometry :

2 moles of H_2O require = 1 mole of Ca

Thus 0.55 moles of H_2O require=\frac{1}{2}\times 0.55=0.275moles  of Ca  

Mass of Ca=moles\times {\text {Molar mass}}=0.275moles\times 40g/mol=11g

Thus 11.0 g of calcium will react with 10.0 grams of water.

3 0
3 years ago
Who was the first scientist to measure speed as distance over time?
777dan777 [17]

Galileo was the first scientist to measure speed as distance over time.

8 0
3 years ago
Fill in the coefficients to balance the equation for the chemical reaction that occurs:
Dominik [7]

Answer:

The equation is balanced

Explanation:

NaCl (aq) + AgNO3(aq) ––> AgCl (s) + NaNO3 (aq)

NaCl (aq) + AgNO3 (aq)

Na = 1 , Cl=1 , Ag = 1 , No3= 1

AgCl (s) + NaNO3 (aq)

Ag = 1 , Cl=1 , Na = 1 , No3= 1

8 0
2 years ago
What two things always combine to form an ionic compound?
kicyunya [14]

Answer:

b.

Explanation:

Cation and anion.

For example Na+ and Cl-  -----> NaCl.

3 0
3 years ago
How many neutrons are in the element sulfur-34
igomit [66]

Answer:

8 neutrons

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • In which material are the particles arranged in a regular geometric pattern?
    7·2 answers
  • True or False? Elements in the same row have similar properties. Question 4 options: True False
    11·2 answers
  • Which sample of matter is classified as a solution? 1. H2O(s) 2. H2O(l) 3. CO2(g) 4. CO2(aq)
    15·2 answers
  • How are physical and chemical changes different
    8·2 answers
  • A solution is prepared at 25 °C that is initially 0.23 M in propanoic acid, a weak acid with K, = 1.3 x 10^-5, and 0.42 M in sod
    6·1 answer
  • An acid can be defined as
    13·2 answers
  • Why is helium trapped in the earth's crust? If it's its trapped in the earth's crust how does it get into the air that we breath
    9·1 answer
  • How many grams of sugar must be dissolved in 150 ML of water to make a solution that has a concern traction of .6 g/ml
    13·1 answer
  • How do I find lattice energy with the overall heat of dissolution of aluminum sulfate?
    13·1 answer
  • (2 KClO3 (s) → 2 KCl (s) + 3 O2 (g) ) If 165 mL of oxygen is produced at 30.0 °C and 90.0 kPa, what mass of KClO3 was decomposed
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!