In Rutherford's gold foil experiments, some alpha particles were deflected from their original paths but most passed through the foil with no deflection. Which statement about gold atoms is supported by these experimental observations
Answers
The experiment shows that the atoms are mostly empty spaces with most of the mass concentrated at the center, which is the nucleus of the atom.
What are Rutherford's experiments?
Rutherford's model also called Rutherfords' atomicmodel was a model describing the nuclear atom or the planetary model of the atom. It gave a description of the structure of atoms.
It was proposed the year 1911 by the New Zealand-born physicist named ErnestRutherford. This model was used to describe the atom. It described the atom as tiny and dense which has a positively charged core called the nucleus.
In the nucleus of the atom, almost all the mass is the atom is concentrated. Around the nucleus, there are the light, negative particles which are called electrons. These circulate around the nucleus at some distance like planets revolve around the Sun.
Therefore, the experiment shows that the atoms are mostly empty spaces with most of the mass concentrated at the center, which is the nucleus of the atom.
Read more about atomicmodels, here
#SPJ6
Related Questions
8.00*10^-5 mol was diluted to 500ml what is the concentration in Mol/L?
A chemical equation is shown below.CH4 + Cl2 → CCl4 + HCl What are the coefficients that should be added to balance this equation? Use complete sentences to explain your answer. Explain how this chemical reaction demonstrates the conservation of mass.
What is true of the rate of radioactive decay? A. The rate is constant. B. The rate is continuously accelerating. C. The rate is continuously decelerating. D. The rate is exponentially accelerating.
If a man has a mass of 83 kilograms on Earth, what will the force of gravity on his body be on the moon? A. 4,880.4 N B. 135.6 N C. 813.4 N D. 318.5 N
Answers
It’s easier to think of it this way- the number of zeros will be the exponent
Answer: 1 x
Explanation: You can see that the only non-zero digit is 1, so it is 1 x 1,000 has 3 zeroes to the left of the period, so it is1x
. Quite simple!
b. atomic mass.
c. molecular size.
d. molecular mass.
Answers
c. water
b. carbon dioxide
d. heat
Answers
A reaction in which the reactants splits to produce two or more products is called a decomposition reaction.
It can be represented as:
XY ------> X + Y
The correct answer is:
Option A. Sucrose
This can be explained as:
- The reaction for the decomposition of sucrose is given as:
C₁₂H₂₂O₁₁ (Sucrose) + 12 O₂ -----> 12 CO₂ (Carbon dioxide) + 11 H₂O (water)
- The reactant of a reaction is written generally on the left side of the reaction.
- The reactant is a substance that reacts and undergoes chemical changes to form products.
Therefore, sucrose is the reactant.
To learn more about decomposition reaction, reactants and products follow the link:
Answers
Answer:
2.05 x 10⁸ uL
205000000 uL
Explanation:
Step 1: Find the conversion
1 liter (L) = 1 x 10⁶ microliters (uL)
Step 2: Set up dimensional analysis
Step 3: Multiply and cancel out units
Liters and Liter cancel out.
We are left with uL
205(1 x 10⁶) = 2.05 x 10⁸ uL or 205000000 uL
Answer: 205000000 microliter
Hope this helps!
B. metalloids
C. non-metals
Answers
The correct answer is C. Non-metals
Explanation:
Krypton is one of the 118 chemical elements that have been identified. Krypton's main characteristics include lack of odor, color, and low reactivity, due to this, this element is classified as a noble gas and in the periodic table is part of the Group 18. Moreover, Krypton is part of the non-metals category that includes elements with low density, melting/boiling point, and conductivity, which are all features exhibit by Krypton as this has low electricity and heat conductivity, low density, low melting point (around -157 °C) and low boiling point (-153 °C). Thus, the category Krypton gas and in general Krypton belongs to is non-metals.
An element is a pure substance made up of only one kind of atom, each of whose nuclei contains the same amount of protons. A substance whose atoms all contain the same number of protons is said to constitute an element; alternatively, all the atoms of a certain element must contain the same number of protons. Here 'Kr' is a non-metal. The correct option is C.
The elements that absorb or gain electrons to generate negative ions are known as non-metals. In their outermost shell, non-metals often have 4, 5, 6, or 7 electrons. High electronegativities are seen in non-metals. This indicates that non-metal atoms exhibit a significant propensity to attract more electrons than they would ordinarily have.
Krypton is a Group 18 rare gas and chemical element with the atomic number 36 and the symbol Kr.
Thus the correct option is C.
To know more about non-metals, visit;
#SPJ6
Answers
U = mCpΔT
where:
m = mass of material
Cp = specific heat capacity of material; in this case, Cpwater = 4.186 J/(g-°C)
ΔT = change in temperature of material
U = 18(4.186)(20-(-10)) = 2260.44 Joules or B.
A positive term means energy was absorbed.
the correct answer is 7897.0 Joules