The sentence, which most accurately describe compounds is this: THEY HAVE A UNIQUE SET OF PROPERTIES THAT CAN BE USED AS IDENTIFIERS.
Compounds are formed when two or more elements combine together in a specific mass ratio. Compounds normally have some properties which can be used to identify them. For instance, water as a compound has the following physical properties: it is odorless, colorless, neutral to litmus paper, it is a liquid at room temperature, it has a boiling point of 100 degree Celsius and a freezing point of zero degree Celsius. All these properties can be used to identify water in case it is given to us as an unknown substance. If the unknown substance does not have all these properties, then it is not water.<span />
Answer:
If an electron is added to an atom energy is given off because of the negative energy.
Explanation:
C.) Electron shells or cloud! :)
I think its 1x^103 (kg/m.3) I hope this help
Answer:
2.353 × 10⁵ years
Explanation:
Since speed, v = distance/time
time, t = distance/speed
The distance, d = circumference of orbit = 2πr where r = radius of orbit = 8.5 kiloparsecs = 8.5 kiloparsecs × 3.1 × 10¹³ kilometers/parsec = 26.35 × 10¹³ kilometers and velocity of sun, v = 220 km/s
So, the time it takes to complete one orbit, T is
T = 2πr/v
= 2π × 26.35 × 10¹³ km/220 km/s
= 165.562 × 10¹³ km ÷ 220 km/s
= 0.753 × 10¹³ s
= 7.53 × 10¹² s
We now convert T to years
T = 7.53 × 10¹² s ÷ 3.2 × 10⁷ seconds/year
T = 2.353 × 10⁵ years
