1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vlabodo [156]
3 years ago
7

1. The basic building block of matter are atoms. Every atom is basically a tiny sphere. Every atom is composed of 2 regions, the

outer part of the sphere is called the _______ and accounts for about 99.95% of the volume of an atom. 2. The electron cloud is the region of an atom in which the __________ are found. __________ are tiny particles with a -1 electrical charge and almost no mass. Electricity is _________ flowing though a conductor, usually metal. 3. Every atom is composed of 2 regions. The very tiny center part of the spherical atom is called the _____________. The __________ accounts for about 99.95% of the mass of the atom even though it has almost no volume. 4. Every atom has a nucleus. The nucleus contains 2 different types of particles. The particle with the +1 electrical charge is called the __________. It has almost 2000 times more mass than an electron. The number of __________ in the nucleus determine how many electrons the neutral atom has and all of the chemical reactions the atom can do. 5. Every atom has a nucleus. The nucleus contains 2 different types of particles. The particle with no (0) electrical charge is called the __________. This particle is electrically neutral. The +1 charged protons would repel each other and destroy the nucleus if the _______________ were not neutralizing the repulsive force between the protons. 6. When graphing how the experimental “effect” depends on the experimental “cause”, the graph can show either a _______________ or an inverse relationship or no relationship. If the “effect” (dependent variable) value increases when we make the “cause” (independent variable) value increase, then we call this a ____________________. 7. When graphing how the experimental “effect” depends on the experimental “cause”, the graph can show either a direct relationship or an ______________ or no relationship. If the “effect” (dependent variable) value decreases when we make the “cause” (independent variable) value increase, then we call this an ____________________. 8. When graphing how the experimental “effect” depends on the experimental “cause”, the graph can show either a direct relationship or an inverse relationship or _____________. If the “effect” (dependent variable) value doesn’t change when we make the “cause” (independent variable) value increase, then we call this ____________________. 9. An experiment needs an _________________ to validate its results. The ________________ can be one of 2 things. The __________________ can be a set of experimental conditions we repeat several times throughout the experiment. Or the ________________ can be a set of conditions which other experimenters have used and is considered “normal” or “state of the art.” 10. A variable is something which can change during an experiment. It works best when we only let 2 variables change. All the rest are kept constant and are called _______________. fill in the blanks with these words. Direct relationship ,No relationship ,Proton(s), Neutron(s), Controlled variable(s), Electron(s), Experimental control, Inverse relationship, Electron cloud, Nucleus.
Chemistry
1 answer:
V125BC [204]3 years ago
7 0

1. The answer is: Electron cloud.

Atom is composed of the nucleus and the electron cloud.

Protons (positive particles) and neutrons (neutral particles) are in the nucleus of an atom and electrons (negative particles) are in the electron cloud.

Nucleus is in the centar of the atom atom and electron cloud is surrounding it.

2. The answer is: Electron(s).

The electron (symbol: e⁻) is a subatomic particle whose electric charge is negative one elementary charge.

Metallic bond increace electrical and thermal conductivity.

Substances with metallic bond conduct an electric current in liquid and solid state, because they have mobile electrons. Most metals have strong metallic bond, because strong electrostatic attractive force between valence electrons (metals usually have low ionization energy and lose electrons easy) and positively charged metal ions.

3. The answer is: Nucleus.

Atomic number (Z) is total number of protons and mass number (A) is total number of protons and neutrons in a nucleus.

Nucleus of an atom has positive charge, electrons are negative and atom has neutral net charge.

For example, alpha particle is nucleus of a helium-4 atom, which is made of two protons (p⁺) and two neutrons (n°).

4. The answer is: Proton(s).

The proton (p⁺) is subatomic particle with a positive electric charge of +1e elementary charge.

Protons and neutrons, each with masses of approximately one atomic mass unit, are called nucleons.

Protons and neutrons are hadrons composed of three valence quarks.

The electron has a mass that is approximately 1/1836 that of the proton and the neutron.

5. The answer is: Neutron(s).

Neutron (symbol: n°) is a subatomic particle with no net electric charge.

Protons and neutrons are found in nucleus of an atom (atomic nuclei).  

They are called nucleons and have masses of approximately one atomic mass unit.

Mass number (A) is sum of protons and neutrons in nucleus of an atom.

6. The answer is: Direct relationship.

For example, the Hertzsprung–Russell diagram shows the relationship between the star's absolute luminosities (the total amount of energy emitted per unit of time by a star) versus their effective temperatures (the temperature of a black body that would emit the same total amount of electromagnetic radiation).

The Hertzsprung–Russell diagram puts each star on a graph according the star's brightness against its temperature.

7. The answer is: Inverse relationship.

For example, Wavelength is the inverse of the frequency.

Wavelength is the distance over which the wave's shape repeats.

The frequency is a measure of how often sinusoidal components of the wave repeat per unit of distance.  

Higher the frequency, shorter the wavelenght.

Shorter the frequncy, longer the wavelenght.

8. The answer is: No relationship.

Correlation is any statistical association, how close two variables are to having a linear relationship with each other.

If the correlation between the two variables is zero, there is no relationship

between them. So, variables have nothing to do with each other.

9. The answer is: Experimental control.

An experimental control is used in scientific experiments to minimize the effect of variables which are not the interest of the study.

The two main variables in an experiment are the independent and dependent variable.

Dependent variable is the variable being tested and measured in a scientific experiment.

Dependent variables depend on the values of independent variables. The dependent variables represent the output or outcome whose variation is being studied.

10. The answer is: Controlled variable(s).

A control variable is an experimental element which is constant and unchanged throughout the course of the experimentation.

For example, if the volume is made the control variable, it is not allowed to change it throughout the course of the experiment.

The control variables are not of primary interest to the experimenter.

You might be interested in
If the age of the middle layer of a rock sample is between 600 million years and 1 billion years, which of the following could b
Varvara68 [4.7K]

200 million year to 550 million years old

6 0
3 years ago
why do you think you can find silver and gold on their own in rocks but calcium and magnesium are combined with other elements t
katrin [286]

Explanation:

Silver and Gold belong to a special group of metals known as the native metals. They are found naturally on their own and not in combined form in rocks.

  • These metals are found uncombined because they are unreactive.
  • They prefer to alloy with themselves.
  • Calcium and magnesium on the other hand are reactive metals.
  • The unreactivity of these metals makes them uncombined in nature.
4 0
3 years ago
Read 2 more answers
What mass of sodium bicarbonate do you start with
valentina_108 [34]

Answer:

84.007 g/mol

Explanation:

welcome

5 0
3 years ago
A solution of ammonia and water contains 2.10×1025 water molecules and 7.10×1024 ammonia molecules. How many total hydrogen atom
Natali5045456 [20]

There are 6.33 × 10²⁵ hydrogen atoms in this solution in total.

<h3>Explanation</h3>
  • There are two hydrogen atoms in each water \text{H}_2\text{O} molecule.
  • There are three hydrogen atoms in each ammonia \text{NH}_3 molecule.

2.10 × 10²⁵ water molecules and 7.10 × 10²⁴ ammonia molecules will contain

2 \times 2.10 \times 10^{25} + 3 \times 7.10 \times 10^{24} = 6.33 \times 10^{25} hydrogen atoms in total.

8 0
3 years ago
What type of organism does this cell most likely belong to?
maks197457 [2]

Answer:

A) a plant

Explanation:

  • A plant cell consists of cytoplasm, chloroplast, nucleus, mitochondria, cell wall, and a Golgi apparatus. They represent a eukaryotic cell of green plants and there are various types of plant cells such as Parenchyma, Collenchyma, Sclerenchyma,  Xylem, Phloem, and the Epidermis.
4 0
3 years ago
Other questions:
  • List three things you would need to consider to determine whether or not a chemical system is at equilibrium?
    14·2 answers
  • Describe the function of a cilia.
    7·2 answers
  • Is carbon dioxide formed during incomplete combustion of methane? ...?
    10·2 answers
  • Which equation represents the combined gas law?
    13·1 answer
  • What are the primary products of burning a fossil fuel?
    15·2 answers
  • A student collects 350 mL of a vapor at a temperature of 67°C. The atmospheric pressure at the time of collection is 0.900 atm.
    8·1 answer
  • 20points
    10·2 answers
  • In order to become stable in an ionic bond, oxygen needs to (A) gain 2 electrons (C) share 2 electrons B) lose 2 electrons​
    11·2 answers
  • The solubility for KCl is 60 g at 40 C. If a solution of KCl contains 79.5 g, is the solution saturated, unsaturated, or supersa
    7·1 answer
  • PLEASE HELP ME ON THIS ​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!