Elements in the same group have _____.
the same number of electron shells
the same number of protons
similar chemical properties
the same number of isotopes
Answer:
Element in the same group have similar chemical properties.
Methane is a gas at room temperature and pressure. Explain why this is the case.
Answer:
hope it helps ❤
Explanation:
Methane only has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.
What makes a good scientific question???
Plsss help! I will give brainliest! :)
Answer:
A good question is testable, detailed, measured, and controlled.
Just let me know if you have any other questions.
Suppose you spill a chemical on yourself:
a. What information can your teacher provide for you concerning that chemical?
b. Where is the information located?
What internal physical structure protects the organs and supports the body of the animal? Fur Feathers Skeleton Skin
Answer:
Skeleton
Explanation:
Answer:
skeleton
Explanation:
Each element has a different:
number of protons and electrons
atomic mass and weight
Properties and characteristics
number of neutrons
Please take your time if needed!
Answer:
(C. Properties and characteristics.
Hope this helpos!
Explanation:
Landon's new toy arrived in the mail covered in foam packing peanuts. The foam packing peanuts have a mass of 30 g and a volume of 60 cm3. What is the density?
2 g/cm3
180 g/cm3
0.5 g/cm3
2
PLZ HELP I WILL GIVE BRAINLY AND 50 POINTS
Put the steps of the scientific method into the correct order.
Devise an experiment to prove or disprove.
State conclusions.
Conduct a literature search.
Define the problem.
Propose a hypothesis.
Answer:
1. State problem
2. Form hypothesis
3. Conduct experiment
4. Interpret data
5. Draw conclusion
Explanation:
PLZ HELP I WILL GIVE BRAINLY AND POINTS
Put the steps of the scientific method into the correct order.
Devise an experiment to prove or disprove.
State conclusions.
Conduct a literature search.
Define the problem.
Propose a hypothesis.
Answer:
1. Define the problem
2. Conduct a literature search
3. Propose a hypothesis
4. Devise an experiment to prove or disprove
5. State conclusions
Explanation: In order to begin an experiment, you must first define a problem or question that you will be answering. Then you must research the problem in order to form a hypothesis, or an educated guess. Then you should devise and execute an experiment to answer your question. The conclusions that you draw will either prove or disprove your hypothesis. Hope this helps!
Why do scientists use models, and why do all models have limitations???
Plsss help! :) I will give brainliest!! :)
Answer:
Scientists use models to represent data/evidence. However, all models have limitations. However, models are simplified versions of reality, and can't be totally accurate in representation.
Hope this helps :)
Answer:
Since models are simpler than real objects or systems, they have limitations. ... It may not predict the behavior of the real system very accurately. But the more computing power that goes into the model and the care with which the scientists construct the model can increase the chances that a model will be accurate.
Why do scientists need to be able to use math?
How is radiant energy from the microwave transformed into heat energy?
Radiant energy comes from gravitational and electromagnetic radiations. This energy from the microwave is transformed into heat energy by the faster-moving molecules.
What is energy conversion?Energy conversion is the process of transformation of the energy from one form to another that also follows the law of conservation of mass or matter. Radiant energy is the heat or energy that is given out by electromagnetic waves in the form of various waves.
This radiant energy has its own characteristics that differentiate it from other waves. The waves from radiant energy have a molecular speed that gets increased by the temperature and this increases collision and kinetic energy producing new substances and generating heat.
Therefore, the movement of particles in microwave transforms the radiant energy into heat energy.
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What type of energy is associated with this movement of the molecules?
Answer:
electric
Explanation:
Explain the law of conservation of energy.
Answer:
Energy cannot be destroyed or created but can be transformed from one form to another
What physical structure of a plant is similar in function to these two objects? a long, narrow garden hose and a group of long plastic drinking straws Bark Pistil Stamen Stem
Quartz, or silicon dioxide (SiO2), is one of the most abundant minerals on Earth. The diagram shows the atomic arrangement of quartz.
Based on the diagram, which statement best describes the atomic arrangement of quartz?
Group of answer choices
An extended structure that is made of repeating patterns of atoms.
A repeating pattern of small molecules that can move freely past each other
Many different kinds of molecules tha combine to form an extended structure.
Many different kinds of atoms that can move freely past each other.
Based on the atomic arrangement of quartz, it is can be concluded that quartz is an extended structure that is made of repeating patterns of atoms.
What is quartz?Quartz is a hard crystalline mineral found within the Earth's crust and which is composed mainly of the mineral silica. Silica is mostly silicon(iv) oxide.
Quartz is colourless and its crystalline structure is of a hexagonal prism. The atoms are arranged in a regular repeating grid to form the hexagonal crystal.
Therefore, it is can be concluded that quartz is an extended structure that is made of repeating patterns of atoms.
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Please help with questions 11-13! I’ll give brainliest
what is the goal of science??
The main goal of science has been building knowledge and understanding, regardless of its potential applications.
What is Science ?
The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
For example, investigating the chemical reactions that an organic compound undergoes in order to learn about its structure.
Therefore, The main goal of science has been building knowledge and understanding, regardless of its potential applications.
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Select all that apply.
Which items are properties of bases?
soapy
sour
bitter
slick
skin damage
Please
Answer:
soapy and bitter
Explanation:
Describe how the Rube Goldberg device design that you created follows the law of conservation of energy. Be sure to include both parts of the law of conservation of energy in your description.
How is science different from other ways of learning about the world??? PLSS HELPP ASAPPP! :)
Answer:
Science does not change across region.
Explanation:
Regardless of language barriers or methods of learning, science is the study of fundamental concepts that explain how our world and the universe works.
Sodium chloride (NaCl) is made from ___ of sodium (Na) and ___ of chlorine (Cl).
Blanks: One Atom and Two Atom
Answer:
one atom, one atom.
Explanation:
Sodium chloride is made from one sodium atom and one chlorine atom.
Sodium has a charge of +1, Chlorine has a charge of -1. These cancel each other out leaving only one atom for both sodium and chlorine.
Organisms can either be made of one cell or made of more than one cell
Answer:
The statement is true.
Explanation:
Organisms can be unicellular (made up of one cell) or multicellular (consisting of more than one cell).
I hope this helps in any way :)
Using a lattice structure of sodium chloride, explain why sodium chloride:
a) forms crystals that are cubic in shape [2]
b) has a high melting point [2]
c) acts as an insulator when solid, but will conduct electricity when molten. [2]
Answer:
hope it helps plz mark me brainliest!
Explanation:
a) This pattern is repeated in all directions, giving a giant three-dimensional lattice structure in sodium chloride crystals. Because of the strong electrostatic forces between them, it takes a great deal of energy to separate the positive and negative ions in a crystal lattice.
b) Sodium chloride has a high melting and boiling point. There are strong electrostatic attractions between the positive and negative ions, and it takes a lot of heat energy to overcome them. Ionic substances all have high melting and boiling points.
c) In the solid state, ionic compounds such as sodium chloride have their ions fixed in position and therefore these ions cannot move so solid ionic compounds cannot conduct electricity. However in the molten state, ions in ionic compounds are free to flow and therefore molten sodium chloride can conduct electricity.
Answer:
i am not sure
Explanation:
you are going to go far
Choose all the answers that apply.
Nitrogen has an atomic number of 7. Its atomic mass is 14. Nitrogen has _____.
seven electrons
seven neutrons
seven electron shells
23 neutrons
14 electrons
Please help (:
If there is not one scientific method, then what do all scientists have in common???
Plsss I will give brainliest, and 12 points !!
Answer:
One thing that all scientists have in common is that they find problems in the world, and attempt to seek answers to those problems. Everything that scientists do begins with observations, leading to questions.
Let me know if this helps!
While no single scientific method is uniformly followed by all scientists, there are certain common aspects and concepts that scientists share in their search of knowledge and understanding.
These are some examples:
Scientists rely on empirical evidence gathered via observation, experimentation, and measurement.
Systematic and Objective Investigation: Scientists explore and analyse events using systematic and objective approaches.
Scientific discoveries should be repeatable, which means that other researchers should be able to replicate the tests and achieve identical results.
Thus, although scientists' methodologies and approaches differ between fields, these basic principles drive their research and contribute to the collective growth of scientific knowledge.
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Hydrogen peroxide is commonly used to clean cuts and wounds. Its chemical formula is
H2O2. This compound has _____.
two atoms of hydrogen
three atoms of oxygen
three atoms of hydrogen
one atom of oxygen
Please help, take your time!
Answer:
two atom of hydrogen,two atom of oxygen
What is the difference between data and evidence???
Helpppp! I will give brainliest! PLSSS!
How is the sun related to nuclear, radiant, and heat energy?
Answer:The sun creates energy through nuclear fusion. Kinetic energy creates heat and light.
Explanation:
What determines the amount of chemical energy a substance has? (Try not to make it long)
Answer: The bonds that hold molecules together contain the chemical energy available in a substance.
Explanation:
