Chemistry Middle School

What are the two main types of luster?

4 points

metallic and nonmetallic

glassy and transparent

shiny and opaque
science

Answers

Answer 1
Metallic and nonmetallic
Answer 2
metallic and nonmetallic

Related Questions

What are the regions of the spectrum with wavelengths that can pass through the atmosphere called?

Answers

Answer:

These regions of the spectrum with wavelengths that can pass through the atmosphere are referred to as "atmospheric windows." Some microwaves can even pass through clouds, which make them the best wavelength for transmitting satellite communication signals.

Explanation:

Hope this helps. Have a great rest of your day :)

. What units would you use to measure a red blood cell?
1. Nanometers
2. micrometers
3. millimeters

Answers

Answer:

nanometers im guessing :<

Explanation:

pleassssse helpppppp

Answers

Answer:

Solar Energy

Explanation:

Social energyyyyyyyyyyyyy

List the three subatomic particles. Give the relative masses and charges of each.Identify the type of bond(s) present in each of the following substances:
NaCl
C2H6
MgO
Ag6
N2O4
F2
Fe5
CO2

Answers

Answer:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

relative charge = -1

Relative mass = 1.1836

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.

Properties of cathode ray:

The ray is travel in straight line.

The cathode ray is independent of composition of cathode.

When electric field is applied cathode ray is deflected towards the positively charged plate.

Hence it was consist of negatively charged particles.

While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

Relative mass of proton= 1

Relative mass of neutron = 1

Relative mass of proton = +1

Relative charge of neutron = 0

The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral.

Explanation:

PLEASE HELPPPP!!!!!!! (for science)

Nora notices water droplets on the grass in the morning. It did not rain during the night. Which statement is true about this change of state?

1. Mass was added to the water particles, resulting in a deposition.
2. Energy was added to the water particles, resulting in evaporation.
3. Mass was removed from the water particles, resulting in sublimation.
4. Energy was removed from the water particles, resulting in condensation.

Answers

Answer:

4

Explanation:

because morning dew is condensation

What is a half-life of an isotope? please help

Answers

Answer:

Explanation:

Hello! Hope this helps!

One important measure of the rate at which a radioactive substance decays is called half-life, or t1/2. Half-life is the amount of time needed for one half of a given quantity of a substance to decay. Half-lives as short as 10–6 second and as long as 109 years are common.

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