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2 years ago

Wich scientist is credited with developing the first scientific atomic theory

Chemistry

1 answer:

Fantom [35]2 years ago

8 0

Answer:

john dalton

Explanation:

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Which contains more molecules: 1.00 mol, H2O2, 1.00 mol C2H2, or 1.00 mol CO?

xenn [34]

A mole of any chemical compound contains the same number of molecules - about 6.022 × 10²³ molecules.
So, 1 mole of H₂O₂, 1 mole of C₂H₂ and 1 mole of CO contain the same number of molecules.

7 0

2 years ago

An object is traveling at a speed of 7500.0 centimeters per second. How many kilometers per day

ivann1987 [24]

Answer:

6,480 kilometers

Explanation:

1 day = 86,400 seconds

1 kilometer = 100,000 centimeters

Equation:

86,400 x 7,500 = 648,000,000

648,000,000 ÷ 100,000 = 6,480

Hope this helped : )

7 0

2 years ago

What is required for electrons to move from the stable energy level to an excited state?

Gekata [30.6K]

answer

When an electron temporarily occupies an energy state greater than its ground state, it is in an excited state. An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet of light, or collides with a nearby atom or particle

3 0

2 years ago

Explain Why s-32 is a stable nuclidle

malfutka [58]

I think it is because it has an even number of valence electrons.

4 0

3 years ago

Read 2 more answers

The isotope 238U, which starts one of the natural radioactive series, decays first by alpha decay followed by two negative beta

Digiron [165]

Answer: The resulting isotope is $^{231}_{92}\textrm {U}$

Explanation:

Alpha Decay: In this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. The mass number is reduced by 4 units and atomic number is reduced by 2 units.

$^{235}_{92}\textrm{U} \rightarrow ^{231}_{90}\textrm {Th}+^{4}_{2}n$

Beta Decay : It is a type of decay process, in which a proton gets converted to neutron and an electron. This is also known as -decay. In this the mass number remains same but the atomic number is increased by 1.

$^{231}_{90}\textrm{Th}\rightarrow ^{231}_{92}\textrm {Th}+2^{0}_{-1}n$

The resulting isotope is $^{231}_{92}\textrm {U}$

6 0

2 years ago