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
Artyom0805 [142]
3 years ago
6

WHICH ELEMENT HAS ATOMIC NUMBER 78?

Chemistry
1 answer:
inn [45]3 years ago
3 0

Answer:

platinum

Explanation:

it's atomic number is 78

You might be interested in
What happens to iron when it melts?
iren [92.7K]

Answer:

B. It undergoes a physical change.

Explanation:

Hello there!

In this case, since we know that chemical changes lead to the formation of new atoms and/or compounds due to the bonds rearrangement of the initial substances and the physical changes occur without changing the composition of the initial substances, we can infer that, since melting is a process that changes the phase of matter from solid to liquid without changing the identity of the initial substance, the answer to this question would be B. It undergoes a physical change. because the other options describe chemical changes.

Best regards!

5 0
2 years ago
Read 2 more answers
WHAT IS THE UNKNOWN METAL?
gavmur [86]

Answer:

The Unknown V was shiny and gray, but it was a lightweight metal. THE UNKNOWN METALS5V was aluminum, which has a density of 2.75 g/ml(Smith, 2019).

Explanation:

pls mark me as brainleast and folow me

6 0
3 years ago
The volume of a sample of <img src="https://tex.z-dn.net/?f=P_b" id="TexFormula1" title="P_b" alt="P_b" align="absmiddle" class=
murzikaleks [220]

Answer : The mass of sample is, 267.5 grams.

Explanation :

Density : It is defined as the mass of a substance contained per unit volume.

Formula used :

Density=\frac{Mass}{Volume}

Given:

Volume of Pb = 23.57cm^3

Density of Pb = 11.35g/cm^3

Now put all the given values in the above formula, we get the mass of Pb.

11.35g/cm^3=\frac{Mass}{23.57cm^3}

Mass=267.5195g=267.5g

Therefore, the mass of sample is, 267.5 grams.

5 0
3 years ago
Which description of salt is a physical property?
Genrish500 [490]

Answer:

salt is dull and brittle and conducts electricity when it has been dissolved into water, which it does quite easily.

Explanation:

transparent and colourless in crystalline form- rather like ice.

4 0
3 years ago
Name three elements that are named after people.
natali 33 [55]

Answer:

Bohrium (Niels Bohr)

Curium (Marie and Pierre Curie)

Einsteinium (Albert Einstein

4 0
2 years ago
Read 2 more answers
Other questions:
  • Use Dimensional Analysis:
    13·1 answer
  • Which chemical is least likely to undergo a chemical reaction
    9·1 answer
  • What is the ph of a 0.10 m solution of ethylamine at 25 oc? the pkb of ethylamine at 25 ºc is 3.25. ethylamine is a weak base?
    8·1 answer
  • I can't understand this I need it done by 4:20​
    8·1 answer
  • PLZ HELP - WILL MARK BRAINLIEST *
    9·1 answer
  • What kind of glacier has pieces that breaks off as icebergs
    14·1 answer
  • If the solubility of a gas is 10.5 g/L at 650 kPa pressure, what is the solubility of the gas when the pressure is 200 kPa? Show
    5·1 answer
  • 1 of 20<br>0 0%<br>In what form (solid, liquid or gas) is crude<br>oil found?<br>Enter your answer​
    8·1 answer
  • The initial internal energy of a system is 43.5kj. it absorbs 8.3kj of heat while performing 3.5kj of work on the surroundings.
    8·1 answer
  • Please help!!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!