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3 years ago

How does a atom form a new substance?

Chemistry

2 answers:

m_a_m_a [10]3 years ago

8 0

The number of protons in a element determines the elements identity

Anni [7]3 years ago

4 0

<span>Atoms combine as the electrons from each atom are attracted to the nuclei of the atoms. This results in bonds ranging from 100% covalent to bonds with high ionic character. The combination of atoms to form compounds occurs when the compounds being formed are at lower energy than the original atoms.</span>

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Put the elements in order from easiest to hardest to remove an electron. Ba,Be,Ca,Sr.

laiz [17]

Answer:

Ba,Sr,Ca,Be

Explanation:

as atomic size increases ionisation potential decreases

8 0

3 years ago

This is a steel penny from 1943. A steel penny will weigh 2.72 g and is

ehidna [41]

Answer:

The easiest way to determine if a 1943 cent is made of steel, and not copper, is to use a magnet. If it sticks to the magnet, it is not copper. If it does not stick, the coin might be of copper and should be authenticated by an expert

Explanation:

5 0

3 years ago

The black, granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell) is mangane

mestny [16]

Answer: c. +4

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

$Mn:25:1s^22s^22p^63s^23p^64s^23d^{5}$

$Mn^{4+}:21:1s^22s^22p^63s^23p^63d^1$

$O:8:1s^22s^22p^4$

$O^{2-}:10:1s^22s^22p^6$

Here manganese is having an oxidation state of +4 called as cation and oxygen forms an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged to give $Mn_2O_4$ which written in simplest whole number ratios to give neutral $MnO_2$

7 0

3 years ago

In parallel circuits, ______ follow down ______ paths.

masya89 [10]

Answer:

Electrons follow multiple paths in a parallel circuit.

Explanation:

3 0

3 years ago

How are the properties of water affected by hydrgen bonding?

olasank [31]

The hydrogen bonds that form between water molecules account for some of the essential and unique properties of water. The attraction created by hydrogen bonds keepswater liquid over a wider range of temperature than is found for any other molecule its size.

Hope this helped!

4 0

3 years ago