only Q4a, pls help i cant process this question

Explanation:

The group 2 ions are in the second column in the periodic table, for example Be, Mg and Ca

The group 3 ions are in the third column in the periodic table, for example B, Al and Ga

It's the same thing for the rest of the groups

Ions either lose or gain electrons to have a full outer shell, just like the noble gases

metal atoms lose electrons from their outer shell to form positively charged ions

From groups 1 to 3 the charge is the same as the group number

Non metals gain electrons on their outer shell to form negatively charged ions

From groups 5 to 7 the charge is 8 subtract the group number

Example: what is the charge for group 6 ions?

8 - 6 = 2, and the charge is negative so 2-

Which of the following equations represents a nuclear charge?

Select one:
a. A
b. B
c. C
d. D​

A sample of hydrogen exerts a pressure of 0.429 atm at 50.00°C. The gas is heated to
95.00°C at a constant volume. What will its new pressure be?

What does an electrically neutral atom have the same number of?

protons and electrons

protons and neutrons

electrons and neutrons

protons, electrons, and neutrons

Elements on the right side of the periodic table are called.

Girls are usually completely physically mature by _____ years old. A. 17 B. 19 C. 14 D. 21.

Select the correct answer. Which statement about cellulose is true? A. It’s a synthetic polymer. B. It’s a raw material used to make plastic. C. It’s produced using oil and gas. D. It’s used to make paper products.

Copper(I) nitrate, CuNO3, is dissolved in water and forms a transparent, blue mixture. What type of mixture is it

According to the Law of Conservation of Matter, what happens to atoms of gas in a balloon when it is placed in the freezer?

the number of atoms stays the same and the energy stays the same, keeping the volume the same


the number of atoms stays the same as the atoms lose energy to the colder freezer, slow down, get closer together, shrinking the volume


the number of atoms increases, causing an increase in energy and an increase in volume


the number of atoms decreases, which takes up less space and decreases the volume

What is the role of flagella?

What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen and 48.68% fluorine if the molar mass of this compound is 156.12 g?

C6H8F4

C5H10F5

C6H6F3

How many moles of H2O2 are produced in the production of hydrogen peroxide when 13 grams of oxygen are used

The materials are carried in a cell by the what

What are two basic categories of matter

Radiant energy is emitted from all objects with temperatures greater than ____________. This means ____________ objects emit radiant energy.

Why must a solution of naoh be standardized using a primary standard, such as khp?.

Coryell walks 11 km south, and then turns east and walks 13 km. What is his
distance?

A pure substance __________ . must be an element. can be separated into simpler substances by physical means. has different chemical and physical properties depending on its source. can be separated into simpler substances by chemical means.

What adaptation’s do swallowtail possess?

Plz it’s urgent

explain why a mixture is used as the electrolyte??

How does carbon dioxide affect the Earth's climate?

Question 17 options:


Carbon dioxide is being added to the soil, which causes weather phenomenon.


Carbon dioxide mixes with water vapor to take harmful chemicals out of the air.


While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.

What must occur before a newly made polypeptide is secreted from a cell?.

Which statement best describes the characteristics of the Sun?
Red in color
at the center of our galaxy
Hotter than most stars
medium in size

does this image show a physical or chemical change?

The electron configuration of element Y ends in s?p4. What is
the symbol for the ion most commonly formed by this element?
a y2+
b y2-
с ү6+
d Y

What color of light is emitted from an excited hydrogen atom where the electron has been promoted to n

The decomposition of A to B is a first-order reaction with a half-life of 32.8 min:


A → 2B


If the initial concentration of A is 0.595 M, how long will it take for the concentration of A to decrease by 10.4 %?

Calcium-49, a radioactive isotope, has a half-life of 9 minutes. If an 80-gram sample of the isotope decays for 27 minutes, how many grams of the original sample remain?

Select one:
a. 60
b. 10
c. 40
d. 20​

what is 37degrees Celsius in Si units​

lemon and amla have a sour taste. why

[WILL MARK BRAINLIEST!!] Describe the relationship between molecular structure and the strength of electrostatic
forces between molecules. How does this impact boiling and melting points?