Answer:
False
Explanation:
A crystalline solid has a well ordered structure. The particles that make up the solid are arranged in a regular repeating pattern. When the solid is heated, this structure gives way, in order words, the solid melts.
Pure solids crystals are known to have sharp melting points. This is a property of crystalline solids.
The statement about “Crystalline solids do not have a sharp melting point” is false. Crystalline solids are solids that have particles arranged in a regular, repeating patterns. They are held together by uniform intermolecular forces. The faces intersect at a specific angle that identifies that substance. They have distinctive internal structures that in turn lead to distinctive flat surfaces. These flat surfaces give a short rage order. When exposed to x – ray diffractometers, they exhibit a distinctive pattern used to identify the material. They give the same face when you turn a crystalline solid around
The number 0.00069 in scientific notation is written as 6.9 × 10^-4.
To write the number 0.00069 in scientific notation, you need to consider scientific notation as a method of writing numbers as a product of a decimal number and a power of 10. By moving the decimal point four places to the right, 0.00069 becomes 6.9. The decimal point move four spaces to the right makes the power 10 to the negative 4, because the number becomes smaller. Therefore, 0.00069 can be written as 6.9 × 10-4 in scientific notation.
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Answer:
b and d are physical
a and c are chemical
hope dis helps
PLZ GIVE BRAINLIEST!!!!!!
Answer:
Burning of a House: Chemical Change
cutting candle wax: physical change
buring a candle: chemical change
keying a car: physical change.
Explanation:
As we all know that like disolves in like solvent.
Here both water and Ethanol are polar. Hence Ethanol soluble in water.
Moreover, both forms intermolecular hydrogen bonds. It enhances the solubility of ethanol.
Both water and Ethanol are called as associate liquids. Hence solubility is more.
Alcohols have higher boiling point than other hydrocarbons due to their polarity and from the fact that they form very strong intermolecular hydrogen bonding. This is due to the large difference in their electronegativity that forms between the oxygen and the hydrogen atom.
Minerals can be described using 7 key characteristics: color, streak, luster, crystal form, hardness, cleavage, and density. These characteristics provide detailed information about a mineral's geological properties.
The characteristics used to describe minerals are generally located in the detail of their geological properties. These characteristics include:
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After a radioactive atom decays, it is the same element that it was before with no measurable change in mass. the decay that is present is gamma decay because gamma decay has photons which has no mass unlike alpha and beta decay.
Answer:
D
Explanation:
on edge 2020