Answer:
its a
Explanation:ok
5. Which of these elements has the greatest atomic radius? *
Be
Mg
Ra
Ba
Which has the larger ionization energy carbon or nitrogen?
Answer:
nitrogen has an ionization energy of 1400 kJ/mol while carbon has an energy of 1086 kJ/mol. Therefore as expected, nitrogen has higher energy than carbon.
This diagram shows a marble with a mass of 3.8 grams (g) that was placed into 10 milliliters (mL) of water.
Complete Question:
This diagram shows a marble with a mass of 3.8 grams (g) that was placed into 10 milliliters (mL) of water. Using the formula V M D = , what is the density of the marble?
(See attachment for full diagram)
Answer:
1.27 g/cm³
Explanation:
First, find the volume of rock:
Volume of rock = volume of water after rock was placed - volume of water before rock was placed
Volume of rock = 13 - 10 = 3ml
Density of rock = grams of rock per 1 cm³
Note: 1 ml = 1 cm³
Let x represent amount of rock per 1 cm³
Thus,
3.8g = 3 cm³
x = 1 cm³
Cross multiply
1*3.8 = 3*x
3.8 = 3x
3.8/3 = 3x/3
1.27 = x
Density of rock = 1.27 g/cm³
Answer:tbh idek i have a diff one
Explanation:
Elements in Group 18 are known
as the noble gasses. What makes
these elements unlikely to react?
A the number and placement of the
protons
B the number of isotopes of the atom
C the number and placement of the
electrons
D the number of neutrons in the nucleus
of the atom
Answer:
C the number and placement of the electrons
Explanation:
Elements react with one another because they want to achieve a full valence shell of electrons. The noble gases already have a full valence shell of electrons, so they are unlikely to react with other elements.
What is Data Analysis?
Data analysis is a process of inspecting, cleansing, transforming and modeling data with the goal of discovering useful information, informing conclusions and supporting decision-making
The atomic number of Neon is 10. The atomic number of Calcium is 20.
Compared with a mole of neon, a mole of calcium contains
Answer:
an equal number of atoms
Explanation:
One mole of a substance contains the Avogadro's number of elementary entities (Atoms, molecules, ion, etc).
Hence, one mole of calcium and one mole of neon will contain exactly the same number of atoms which is 6.02 *10^23 atoms. This is known as the Avogadro's number.
Comparing 1 mole of Neon to 1 mole of calcium, both substances contains
6.0221 x 10²³ atoms.
The atomic number of neon is 10 and the atomic number of calcium is 20.
The atomic number of an atom is the number of proton of an atom.
1 mole of Neon can be represented as follows
Ne
1 mole of Calcium can be represented as follows:
Ca
Avogadro's number, or Avogadro's constant, is the number of particles found in one mole of a substance.
This experimentally determined value is approximately 6.0221 x 10²³ particles per mole.
This means 1 mole of any substance contain 6.0221 x 10²³ atoms.
Comparing 1 mole of Neon to 1 mole of calcium, both substances contains
6.0221 x 10²³ atoms.
learn more on atomic number : https://brainly.com/question/11027234?referrer=searchResults
What is the formula for finding force?
Is a television remote ac or dc
What is the nuclear equation for californium-253 formed by alpha emission?
Answer:
Explanation:
During α-decay, an atomic nucleus emits an alpha particle. ... Note that the sum of the subscripts (atomic numbers or charges) is the same on each side of the equation. Also, the sum of the superscripts (masses) is the same on each side of the equation.Jul 29, 2014