How did Mendeleev arrange the known elements in his periodic table?

When two or more substances blend but do not chemically combine it is a _____________.

Oksi-84 [34.3K]

Answer:

Mixture.

Explanation:

Hello,

In this case, when blending we are continuously sliding the substances until we obtain small particles that when do not chemically but physically combine we say they are forming a mixture. Nevertheless, when they chemically combine they form a chemical compound due to the formation of bonds between them.

Regards.

6 0

3 years ago

Match each of the following descriptions to thecorrect element listed

Slav-nsk [51]

Answer: Please see explanation for answer

Explanation:Matching the descriptions to the correct element listed gives

Element Group Name Group No Metal/ Nonmetal/ Metalloid Description

Neon Noble gases 18 Non metal Colorless, tasteless, and odorless gas, unreactive, nonconductive.

Bromine Halogens 17 Non metal Not found as a free element (uncombined) in nature, reddish-brown liquid that vaporizes readily at room temperature to a red gas with a strong disagreeable odor.

Beryllium Alklaline earth metal 2 Metal Silvery-white, ductile, malleable, conductive solid with a high melting point for this type of element

Platinum Platimum group metals 10 Metal Silvery white, relatively soft, low density, conductive solid that is not found as a free element in nature but commonly found combined in alloys with copper or nickel

Potassium Alkali Metals 1 Metal Soft, easily cut with a knife to expose a silvery surface that rapidly oxidizes in air; never found uncombined in nature

Silicon Carbon family 1`4 Metalloid Metallic luster and grayish solid, very common in rocks and gemstones such as amethyst and opal, semiconductor

Sulfur Calcogens 16 Non metal Pale yellow, odorless, brittle solid at room temperature, nonconductor

4 0

3 years ago

The polarity of the water molecule aids in dissolving compounds. This is demonstrated by all but which statement?A)The water mol

never [62]

Answer:

The correct option is;

A) The water molecules group together in clumps.

Explanation:

To answer the question, we look at each option as follows

A) The water molecules group together in clumps

This does not aid dissolution of compounds as clumping excludes non polar molecules, making them less soluble.

B) The partial negative oxygen atom end of the water molecule surround cations.

When an ionic compound such as NaCl is dissolved in water, the oxygen atoms surround the positive Na⁺ cations in the solution.

C) The partial positive hydrogen atom end of the water molecule surround anions

When the ionic NaCl compound is dissolved in water, the hydrogen atoms surround the negative Cl⁻ anions in the solution.

D) The water molecules also dissolve nonelectrolytes by creating a hydration sphere around the molecule.

Water is able to dissolve nonelectrolytes by creating an hydration sphere or hydration shell around the molecule.

3 0

3 years ago

Read 2 more answers

Need help with science pls help me

hoa [83]

Answer:

B. negative charge only

Explanation:

The saying "opposites attract" is true in the case. Since the rod is positively charged, the sphere must have a negative charge to be attracted to it.

A sphere that is positively charged would be repelled from the rod, and a neutral sphere would not be attracted or repelled.

3 0

3 years ago

In a particular breed of cattle, a black coat is dominant over a red coat. If a cow with a red coat is crossed with a black bull

larisa86 [58]

C.75%. Because the B is dominant

3 0

3 years ago