Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid

Physics

2 answers:

Lelechka [254]3 years ago

5 0

Doberiner and lavoiser

Basile [38]3 years ago

3 0

Answer:

Antoine Lavoisier and Johann Döbereiner

Explanation:

One of the very first attempt to classify the elements was made in 1789 by Antoine Lavoisier who grouped all the elements based on their properties into whether they are gases, metals or non metals and earths metals.

Johann Döbereiner in 1829, recognised triads of elements with similar chemical properties and showed that the properties of the element that is in the middle of other two elements can be predicted from the properties of the other two.

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two 2.5 kg balls move away from each other one traveling 3 m/s to the right the other 4 m/s to the left what is the magnitude of

Juli2301 [7.4K]

Answer:

2.5 kg.m/s

Explanation:

Taking left side as positive while right side direction as negative then

Momentum, p= mv where m is the mass of the object and v is the velocity of travel

Momentum for ball moving towards right side=mv=2.5*-3=-7.5 kg.m/s

Momentum for the ball moving towards the left side=mv=2.5*4=10 kg.m/s

Total momentum=-7.5 kg.m/s+10 kg.m/s=2.5 kg.m/s

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