2 years ago

The smallest unit of an element

Chemistry

1 answer:

Sliva [168]2 years ago

8 0

The smallest unit of an element that retains the chemical and physical properties of an element is an Atom.

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Which statement(s) is/are TRUE about covalent bonds?

tresset_1 [31]

Answer:

1. Covalent bonds can form between two nonmetal atoms.

2. Covalent bonds can form between atoms of the same element.

3. Covalent bonds can form between atoms of different elements.

Explanation:

I hope this helps u! :D

Explanation:

3 0

3 years ago

write a balanced chemical equation for solid copper reacting with aqueous silver nitrate to produce aqueous copper (II) nitrate

sashaice [31]

Make sure have same amounts of species on both sides
Cu (s) + 2 AgNO3 (aq) -> Cu(NO3)2 (aq) + 2 Ag (s)

7 0

2 years ago

What is the limiting reactant when 19.9 g CuO react with 2.02 g H2?

Harlamova29_29 [7]

Answer:

Explanation:

use the equation

moles = mass/mr

=19.9/79.5

=0.250moles of CuO

then do the same for

H = 2.02/1

=2.02

so CuO is the limiting reagent because there is less amount of it.

Hope this helps :)

4 0

2 years ago

An atom or ion has 41 neutrons, 36 protons, and 36 electrons. Identify the element symbol, and determine the mass number

igor_vitrenko [27]

Answer:

Element symbol: Kr.

Mass number: 77.

Charge : 0.

Explanation:

Hello,

In this case, since such substance has the same amount of protons and electrons we can infer it is an atom whose number of neutrons is defined by considering its atomic mass or mass number and atomic number which is actually equal to the number of protons and electrons (36):

$neutrons=atomic\ mass - atomic\ number$

In such a way, solving for the atomic mass we obtain:

$atomic\ mass=neutrons+ atomic\ number\\\\atomic\ mass=41+36=77$

It means that the element is krypton (Kr) as it has 36 electrons and protons so its charge is 0.

Best regards.

5 0

3 years ago

An insoluble solid is placed in water and the system allowed to reach equilibrium. The ratio of the rate at which ions join the

solmaris [256]

Answer:

One

Explanation:

Because it reaches an equibrum state so it's equals to one

7 0

2 years ago