The characteristics of the reactivity of the periodic table allows to find the correct answers to the different questions are:
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
1) The reactivity of a chemical element is the tendency to combine with others, this increases as it has fewer electrons in its last layer and since they are more weakly bonded.
Consequently, halogens have seven electrons in their last shell tends to attract an electron to remain with the full level and the alkaline that an electron has in the last shell tends to lose the electron to remain with a complete shell.
If we examine the periodic table the number of electrons in the last shell decreases from right to left.
Let's review the different claims:
a) False. The elements on the right side have a higher atomic number, therefore more protons.
b) True. The elements have more protons therefore it has to attract other electrons and the reactivity decreases.
c) False. As it has more electrons, it has more energy levels, losing all the electrooens is more difficult, so the reactivity decreases.
d) False. By having more electrons it has more energy levels.
2) What is the unique characteristic of the elements of group 18
The elements of group 18 are the noble gases, they have their last full layer therefore they do not have.
the correct answer is: They are very nonreactive.
3) The reactivity in the period table decreases with increasing period therefore the element of period 3 is the most reactive in this case Sodium and Halogen of group 5 is the most reactive in this case Bromine.
the compound Na and Br is the most reactive of all.
4) Rubidium has 1 electron in its last shell, both in a chemical reaction pole loses the electron.
the correct answer is: Rb loses an electron
In conclusion, using the characteristics of the reactivity of the periodic table, we can answer the different questions..
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
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The whole Patterns of Reactivity Quick Check for Honors Chemistry is
1) B. Metals on the right have more protons, causing valence electrons to be held more strongly.
2) B. by gaining electrons
3) B. They are very nonreactive
4) A. Cs and Br
5) A. Rb loses an electron
ce cantitate se solutie NaOH de cantitate 0.2 M reactioneaza total cu 300g fenol de puritate 90%?
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CAN YOU BRAINLEST ME
atoms from different element combine to form
Answer:
new substances
Explanation:
Atoms of different elements can combine to make new substances. A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.
based on the dosages a patient receives what level of precision should a syringe have to ensure that the patient receives the proper dosage
Answer:
No.
Explanation:
The person giving the dosage should make sure there is a proper dosage. The syringe only tells you how much there is in the syringe.
why can't you balance CaC2 + H2O > Ca(OH)2 + CH4?
Answer:
Balance The Chemical Equation Cac2 H2o Ca Oh 2 C2h2 Balance the chemical equation CaC 2 + H 2 O → Ca (OH) 2 + C 2 H 2 Calcium carbide react with water to produce calcium hydroxide and acetylene.
Explanation:
CaC2 + H2O > Ca(OH)2 + CH4
Ca + 2 H2O → Ca(OH)2 + H2 - Balanced equation
What is balance equation with example?A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia
What is the balance chemical formula?Balanced chemical equation - A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.
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True or false when heat is added to atoms the molecules vibrate much more slowly
Answer:
false
Explanation:
The particles are held together too strongly to allow movement from place to place but the particles do vibrate about their position in the structure. With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly
The density of a liquid is 6.0g/cm3 , when it fills a container of volume 300cubic centimeters . What is the mass of the liquid in the container?
Answer:
1800g
Explanation:
b/c d=m/v
m=dv
m=300×6=1800g
The mass of the liquid in the container is equal to 1800 g.
What is the density?The density of an object can be described as the mass per unit volume of the object. The average density of any substance equals the total mass of the substance divided by its total volume.
The mathematical formula of the density can be expressed as follows:
The density of material = Mass/Volume
Mass = density × Volume
The S.I. unit of the density of any substance is Kg/m³ and it is an intrinsic property. If the size of the substance increases, the mass increases as well but the density of the substance will stay constant.
Give, the density of the liquid, d = 6.0 g/cm³
The volume of the container, V = 300 cm³
The mass of the liquid = 6 ×300 = 1800 g
Therefore, the mass of the liquid is equal to 1800 g.
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when using a ph meter to monitor a stirring reaction mixture, where should you place the ph sensor electrode?
Answer:Between the stirring vortex and the side of the glassware
When using a ph meter to monitor a stirring reaction mixture, the ph sensor electrode
should be placed;
between the stirring vortex and the side of the glassware.
The pH meter is an electric device that is used to measure the hydrogen-ion activity in water-based solutions. This means that it is used to measure the PH which is the acidity or alkalinity.
The pH meter is made up of a voltmeter attached to a pH-responsive electrode and a reference electrode.
Now, this pH-responsive electrode is usually made of glass while the reference electrode is usually a silver–silver chloride electrode.
Now when monitoring the stirring reaction mixture, the PH-responsive electrode written above is usually placed between the stirring vortex and the side of the glassware.
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What is the windward side of the sand dune
Answer:
A dunes windward side is the side where the wind is blowing and pushing material up. A dunes slip face is simply the side without wind. A slipface is usually smoother than a dunes windward side. A collection of dunes is called a dune belt or dune field.
Explanation:
Hope this helps...
identify two ways in which carbon-12 carbon-13 and carbon-14 are alike
Answer:
identify two ways in which carbon-12, carbon-13, and carbon-14 are alike. they each have 6 protons and neutrons and they're all carbon atoms. what is a chemical compound?
Use the information about igneous rocks A-D to classify each one as intrusive or extrusive and basaltic or granitic. Fill in the
chart with A, B, C, or D.
Rock A-dark-colored large grains
Rock B-large crystals, high percentage of silica
Rock C-fine-grained texture, light-colored
Rock D—from Hawaiian volcano area, no visible crystals
Extrusive
Intrusive
1.
2.
Basaltic
Granitic
3.
4.
Answer:
1. D 2.. A 3. C 4. B
Explanation:
just took the quiz
We can classify each rock as intrusive or extrusive and basaltic or granitic as follows; Rock A - Extrusive, Basaltic, Rock B - Intrusive, Granitic, Rock C - Extrusive, Basaltic, and Rock D - Extrusive, Basaltic.
Rock A - Extrusive, Basaltic
Rock A is described as having dark-colored large grains, which indicates a fine-grained texture, typical of extrusive rocks. The presence of dark-colored large grains suggests a basaltic composition.
Rock B - Intrusive, Granitic
Rock B is described as having large crystals and a high percentage of silica, which suggests a coarse-grained texture, typical of intrusive rocks. The high silica content and large crystals indicate a granitic composition.
Rock C - Extrusive, Basaltic
Rock C is described as having a fine-grained texture and being light-colored, which are characteristic features of extrusive rocks. The fine-grained texture suggests a rapid cooling, typical of extrusive rocks, and the light color is indicative of a basaltic composition.
Rock D - Extrusive, Basaltic
Rock D is described as being from the Hawaiian volcano area and having no visible crystals. This indicates a glassy texture, typical of rapidly cooled extrusive rocks. The origin from a volcanic area and glassy texture suggest a basaltic composition.
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household substances that contains acid
Answer:
milk, lemon juice, toothpaste and baking soda
HELP FAST PLEASE !!!!
Explanation:
See the table above. Periods at the side, metals at the top, non metals to the right, group to the right of that
any push or pull is called
Answer:
A Force.
Explanation:
A force is a push or pull upon an object resulting from the object's interaction with another object. ... Forces only exist as a result of an interaction.
a car is parked along a level road identify the forces that act upon the car
Answer: Gravity i think
PLZZ HELP
Which of the following Is acompound?
Ne
N₂
Naci
02
Answer:
[tex]N2[/tex]
Explanation:
Because
Molecular nitrogen (N2) is a very common chemical compound in which two nitrogen atoms are tightly bound together.
In 6CH4, we have 6 molecules of CH4. What is the 6 called?
Answer:
The coeffeceient
Explanation:
a liquid can be described as a form of matter that
Answer:
That has no fixed shape but it have fixed volume.
I'll mark brainly pls help
a 47.0 ml aliquot of a 0.400 m stock solution must be diluted to 0.100 m. assuming the volumes are additive, how much water should be added?
Answer:
141 ml
Explanation:
I will brainless who can answer this all pleaseeeeej
Answer:
1. FALSE
2. TRUE
3. TRUE
4. FALSE
5. FALSE
6. TRUE
7. TRUE
8. TRUE
9. TRUE
10. TRUE
Explanation:
1. Conduction occurs more readily in solids and liquids
2. Gold is used as a contact metal in the electronics industry as it is a good conductor of both electricity and heat.
3. None
4. Radiation is the fastest mode of heat transfer while conduction is the slowest mode of heat transfer
5. Heat from Sun reaches us by the process of radiation
6. None
7. It is the motion of particles that creates a form of energy called heat (or thermal) energy that is present in all matter
8. At a temperature of 0o C, the thermal energy within a given system is also zero
9. None
10. None
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Soraya left some soup in the refrigerator. She looked at the soup every day, but she always decided not to eat it. After five days, she started to see mold growing on the surface of the soup. She looked up mold online and found that mold is made of fungal cells. Why didn't Soraya see the mold growing on the soup before the fifth day? Why can she see it now?
Explanation:
In general, the longer that moisture is present, the greater the chance for mold to grow and spread. When mold spores encounter a moist surface, it starts growing within a few hours, spreading into the material while also filling the air with thousands of mold spores.
An atom has 7 protons, 8 electrons, and 7 neutrons. What is the charge of the
atom and what type of ion is it?
Answer: An atom containing 7 protons, 8 neutrons, and 7 electrons is charge-neutral.
Explanation:
An atom is composed of protons (positively charged), neutrons (no charge) and electrons (negatively charged). The excess or defect of electrons in relation to protons determines the charge of an atom.
The atom described is an anion with -1 charge as it has one extra electron than protons.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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5 Facts about Geology
how much muriatic acid to lower alkalinity in pool
Answer:
One gallon of muriatic acid
Explanation:
i think
Could someone help me pls
Answer:
a) dispersion
b) draw the path ray of green light between the red and violet path rays
c) greater/faster
Explanation:
b) Order of rainbow colours:
RedOrange YellowGreenBlueIndigoVioletc) Violet is the most refracted colour while red is the least refracted colour; the colour with a greater speed is the most refracted
Is vegetable soup a homogeneous or heterogeneous mixture
Answer:
heterogeneous
Explanation:
have you ever started to eat veg soup and begin with a spoon full of broth, no veggies,
Then when you get to the end, there are veggies. no broth.
In a homogeneous mixture, every sample is the same
in a heterogeneous mixture, the composition changes from sample to sample
Could someone please help me
Answer:
Whistle 2 has a lower pitch, but is louder.
Whistle 3 has higher pitch and is less loud.
Explanation:
The more frequent the arches are the higher the pitch.
The larger the amplitude the louder the sound is.
;D
Which set of substances contains only compounds?
Answer:
non metals are elements and elements are pure substances
Explanation:
1. A unit of mass used to express atomic and molecular weights. One proton or
neutron equals one mass unit.
Atom
Atomic mass
Nucleus
Amy
Protons
Neutrons
Uranium
Electrons
Hydrogen
Answer:
Atomic mass
Explanation:
It is the unit used o express atomic and molecular weights.
a space probe identifies a new element in a sample collected from an asteroid. successive ionization energies, in attojoules per atom, for the new element are given in the table. i1 i2 i3 i4 i5 i6 i7 0.507 1.017 4.108 5.074 6.147 7.903 8.294 to what family of the periodic table does this new element probably belong?
The element belongs to group 17 of the periodic table.
In the periodic table, elements are arranged in groups depending on their properties. Usually, elements whose atoms have the same number of valence electrons are placed in the same group.
All the elements in group 17 have seven electrons on their outermost shell. Since an ionization energies of the electrons on the valence shell of an atom are always close together, the ionization energies of the seven electrons as shown indicate that they must be on the same shell.
Hence, the new element must be a member of group 17 of the periodic table.
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