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Stolb23 [73]
2 years ago
7

Which element ends in 4d2

Chemistry
1 answer:
Tju [1.3M]2 years ago
3 0

Answer:

Zr (Zirconium)

Explanation:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2

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Name the following covalent compound:
mote1985 [20]

Answer:

Pentasulfur nonanitride.

Explanation:

In order to name a compound properly, we need to identify the type of a compound we have. The given compound consists of two non-metals, sulfur and nitrogen. This implies that we have a covalent compound in contrast to an ionic compound which consists of a metal and a non-metal.

To name a molecular/covalent compound, we should use prefixes stating the number of atoms we have. In this case, we have 5 sulfur atoms. The prefix for 5 is 'penta'. That said, we have 'pentasulfur' as our beginning of the name.

We also have 9 nitrogen atoms. The second atom in the molecular formula would have an ending of '-ide', so we expect to have 'nitride'. Adding a prefix for 9, we'd have 'nonanitride'.

Putting everything together, the name is pentasulfur nonanitride.

Some common prefixes:

mono – one (we don't state mono for the first atom, e. g., we would name CO as carbon monoxide instead of monocarbon monoxide);

di – two;

tri – three;

tetra – four;

penta – five;

hexa – six;

hepta – seven;

octa – eight;

nona – nine;

deca – ten.

Notice that 'decanitride' would be correct in case you had 10 nitrogen atoms, similarly, tetra and hexa stand for 4 and 6 instead of 5 given sulfur atoms.

6 0
3 years ago
The salts you tested were held together by ionic bonds. The compounds were made of two types of ions, positive and negative, tha
vladimir1956 [14]

Answer:

A an ionic compound that completely dissolves in water, forming many ions

Explanati

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3 years ago
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The location of four different fossils in the layers of a rock are listed below. Fossil A: Second layer from top Fossil B: Third
maxonik [38]
Fossil C is the youngest. Layers further down were placed earlier than others. Because C is on the top layer, it must be the youngest (unless a disaster mixed up all the layers!).
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Salt seems to dissappear when it is poured into water. Use mixture, solution, and dissolve to explain what happens.
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The salt desolves into the water which forms a solution which is called a mixture.
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Most organic polymers are named based on the monomers used in their production. However, poly(vinyl alcohol) (PVA) is not made f
aleksandrvk [35]

Answer:

Polymerization involves the synthesis of two or more monomers to get a polymer which is usually complex.

Polyvinyl alcohol can’t be used as a monomer(raw material) for polymerization because it is very unstable under normal conditions and will rearrange molecularly to give polyvinyl acetaldehyde.

8 0
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