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
Lorico [155]
3 years ago
14

Which family or group describe the elements in column 1?

Physics
1 answer:
mojhsa [17]3 years ago
3 0

The group of Alkali metals describe the element in column 1 of the Modern Periodic Table.

Explanation:

Elements in the Periodic Table are arranged in the form of rows and columns. Elements in a row are in the increasing order of atomic number and have the same number of shells. Elements in a column have the same number of electrons in their valence shells. Elements in a column are arranged such that they have similar properties.

There are four distinct groups in the periodic table; alkali metals, alkaline earth metals, halogens and noble gases.

The first column of the Periodic table forms the alkali metals family which has the following order down the column; lithium(Li), sodium(Na), potassium(K), rubidium(Rb), cesium(Cs) and francium(Fr). They have similar properties. Alkali metals are soft and can easily be cut. They have very low densities. They also have low melting points.

Reactivity: Alkali metals are the most reactive metals because they only have one valence shell electron.

Keywords: Periodic table, alkali metals, alkaline earth metals, reactivity, elements

Learn more about the periodic table groups from brainly.com/question/1704778

#learnwithBrainly

You might be interested in
*photo attached* The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.67 m and 1.01 m, respectivel
stiks02 [169]

(a) The speeds of the tips of both rotors; main rotor <u>178.3 m/s</u> and  tail rotor <u>218.4 m/s</u>.

(b) The speed of the main rotor is <u>0.52</u> speed of sound, and the speed of the tail rotor is <u>0.64</u> speed of sound.

<h3>Linear speed of main motor and tail rotor</h3>

v = ωr

where;

  • ω is the angular speed (rad/s)
  • r is radius (m)

v(main rotor) = (444 rev/min x 2π rad x 1 min/60s) x (0.5 x 7.67 m)

v(main rotor) = 178.3 m/s

v(tail rotor) = (4,130 rev/min x 2π rad x 1 min/60s) x (0.5 x 1.01 m)

v(tail rotor) = 218.4 m/s

<h3>Speed of the rotors with respect to speed of sound</h3>

% speed (main motor) = 178.3/343 = 0.52 = 52 %

% speed (tail motor) = 218.4/343 = 0.64 = 64 %

Thus, the speed of the main rotor is 0.52 speed of sound, and the speed of the tail rotor is 0.64 speed of sound.

Learn more about linear speed here: brainly.com/question/15154527

#SPJ1

5 0
2 years ago
Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the gro
Gekata [30.6K]
The answer is c, because ball is falling so its gravitationl potential energy decreases, but it kinetic energy increases. Energy is always conserved.
7 0
3 years ago
A car of mass 1,000 kilograms is moving initially at the speed of 22 meters/second. When the brakes are applied, it takes the ca
Mariulka [41]

i believe it is C....tell me if im right please<3

4 0
3 years ago
Read 3 more answers
What is the value of the initial horizontal velocity?
Dima020 [189]

Initial Velocity is the velocity at time interval t = 0 and it is represented by u. It is the velocity at which the motion starts.

<h2>I hope this helps...</h2><h2>Good day :)</h2>
4 0
3 years ago
The neurotransmitter acetylcholine:
tatuchka [14]

Explanation:

A. is chemically identical to heroin.

3 0
3 years ago
Other questions:
  • How much heat is needed to raise the temperature of 200 g of lead (c = 0.11 kcal/kg ∙ °c) by 10 c°?
    9·1 answer
  • A 72 kg skydiver is descending on a parachute. His speed is still increasing at 1.2 m/s2. What are the magnitude and direction o
    15·1 answer
  • Water makes a good coolant because it has a ____.
    8·2 answers
  • A 960 kg motorboat accelerates away from a dock at 2.3 m/s2 .t Its propeller provides a thrust force of 4.1 kN .
    7·2 answers
  • How many layers of data can a DVD store?<br> 3<br> 2<br> 4<br> 1<br> 1
    9·1 answer
  • Physical properties of a base include...
    15·1 answer
  • What does local acceleration mean?
    12·1 answer
  • Which of the following is not a part of dalton s atomic theory?
    9·2 answers
  • A projectile of mass 2.0 kg is fired in the air at an angle of 40.0 ° to the horizon at a speed of 50.0 m/s. At the highest poin
    5·1 answer
  • What happened from the mid 1700s to the mid 1800s that contributed to the change in the global human population?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!